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View All : Main > Courses > Rose-Hulman Institute of Technology > ES203 - Electrical Systems
Category: Week 1/
diagram_thumbnail Problem 1

Which devices are labeled according to the passive sign convention (PSC)?

DC Circuits > Circuit Variables > Passive Sign Convention
Keywords:
  • Independent Voltage Source,
  • Resistor,
  • Independent Current Source,
  • Battery
,
  • Passive Sign Convention Rules
Length: 1:40    Date Added: 2006-08-29 13:31:10    Filename: cktvars_psc_ex1    ID: 2
Problem 1

(a) Suppose that a 12-volt automobile battery with 100 amp-hour capacity is fully charged. How much energy (in joules) is stored in the battery?

(b) Next, suppose that the battery needs to supply the automobile's emergency flashers while the driver seeks roadside assistance. The flashers consume 50 watts of power when on, and the flashers are active for a half second out of every two seconds. Assuming that the battery can maintain its rated output voltage until completely depleted of stored energy, how long (in hours) will the battery be able to operate the flashers?

DC Circuits > Circuit Variables > Energy
Keywords:
  • Battery
,
  • Dimensional Analysis,
  • SI Units
,
  • Algebra
Length: 5:22    Date Added: 2007-05-23 20:24:04    Filename: cktvars_energy_ex1    ID: 40
diagram_thumbnail Problem 2

For each device, state whether Passive Sign Convention (PSC) or Active Sign Convention (ASC) is used for the defined current and voltage. Then determine whether the device is absorbing or delivering power.

DC Circuits > Circuit Variables > Passive Sign Convention
Keywords:
  • Independent Voltage Source,
  • Resistor,
  • Independent Current Source,
  • Battery
,
  • Passive Sign Convention Rules
,
  • Algebra
Length: 3:45    Date Added: 2007-05-23 20:24:04    Filename: cktvars_psc_ex2    ID: 46
diagram_thumbnail Problem 3

For labeled currents, draw an arrow to show the direction of positive current. For labeled voltages, circle the node that is at the highest potential.

DC Circuits > Circuit Variables > Passive Sign Convention
Keywords:
  • Generic device,
  • Wire
,
  • Passive Sign Convention Rules
Length: 1:41    Date Added: 2007-05-23 20:24:04    Filename: cktvars_psc_ex3    ID: 47
diagram_thumbnail Problem 1

For each current source, draw a current label (arrow and value) pointing up or to the right that is equivalent to the indicated current.

DC Circuits > Circuit Elements > Current Sources
Keywords:
  • Independent Current Sources
,
  • Definition of Current Direction
,
  • Algebra
Length: 1:17    Date Added: 2007-05-23 20:24:04    Filename: cktels_cs_ex1    ID: 79
diagram_thumbnail Problem 2

Which of the following circuit connections are invalid?

DC Circuits > Circuit Elements > Current Sources
Keywords:
  • Independent Current Source,
  • Resistor
,
  • Definition of Current Direction
,
  • Algebra
Length: 2:22    Date Added: 2007-05-23 20:24:04    Filename: cktels_cs_ex2    ID: 80
diagram_thumbnail Problem 1

For each voltage source, draw a voltage label (polarity indicators and value) with the positive indicator at the top or to the right that is equivalent to the indicated voltage.

DC Circuits > Circuit Elements > Voltage Sources
Keywords:
  • Independent Voltage Source
,
  • Definition of Voltage Polarity
,
  • Algebra
Length: 1:25    Date Added: 2007-05-23 20:24:04    Filename: cktels_vs_ex1    ID: 81
diagram_thumbnail Problem 1

For each current source, draw a current label (arrow and value) pointing up or to the right that is equivalent to the indicated content.

DC Circuits > Circuit Elements > Dependent Current Sources
Keywords:
  • Dependent Current Source
,
  • Definition of Current Direction
,
  • Algebra
Length: 2:10    Date Added: 2007-05-23 20:24:04    Filename: cktels_depcs_ex1    ID: 82
diagram_thumbnail Problem 2

Which of the following circuit connections are invalid?

DC Circuits > Circuit Elements > Voltage Sources
Keywords:
  • Independent Voltage Source,
  • Resistor
,
  • Definition of Voltage Polarity
,
  • Algebra
Length: 1:47    Date Added: 2007-05-23 20:24:04    Filename: cktels_vs_ex2    ID: 85
diagram_thumbnail Problem 1

For each voltage source, draw a voltage label (polarity indicators and value) with the positive indicator at the top or to the right that is equivalent to the indicated voltage.

DC Circuits > Circuit Elements > Dependent Voltage Sources
Keywords:
  • Dependent Voltage Source
,
  • Definition of Voltage Polarity
,
  • Algebra
Length: 1:49    Date Added: 2007-05-23 20:24:04    Filename: cktels_depvs_ex1    ID: 86
Problem 1

A "night light" illuminates dark hallways and children's rooms at night. Older night lights use incandescent bulbs (tungsten filament in an evacuated glass envelope), while newer night lights use light-emitting diodes (LEDs). The older style night light bulb requires 4 W of power to operate, while a newer LED night light might require about 0.2 W of power. According to the U.S. Department of Energy, a kilowatt-hour costs 9.85 cents for the residential customers, on average (http://www.eia.doe.gov/cneaf/electricity/epm/table5_6_b.html).

During the course of a year, what is the total cost saved by using an LED-based night light instead of the older style night light?

DC Circuits > Circuit Variables > SI Units
Keywords:
  • light,
  • LED
  • algebra
Length: 4:20    Date Added: 2007-05-23 20:24:04    Filename: cktvars_units_ex1    ID: 246
Problem 3

As of 1983, the definition of a "meter" is based on the speed of light, specifically, the distance that light travels in a vacuum during the time interval 299,792,458-1 seconds. Electrical signals moving in a cable (for example, the coaxial cable that connects your television to the cable jack in the wall) travel at approximately 70% of the speed of light. Speaking of television, a high-definition (HD) receiver can update its display 60 times per second, where each display frame contains 1280x720 pixels.

So: How far can the television signal travel in a coaxial cable during the time that an HD receiver is drawing a new pixel on the screen?

DC Circuits > Circuit Variables > SI Units
Keywords:
  • television,
  • pixel,
  • coaxial cable
  • algebra
Length: 3:15    Date Added: 2007-05-23 20:24:04    Filename: cktvars_units_ex3    ID: 247
Problem 4

Beginning in Beijing, China, you need to travel about 11,000 kilometers to reach New York City. Communication satellite signals traveling between these two cities move at close to the speed of light (3x108 meters per second). The eye blink duration of a human is approximately 300 milliseconds. So, is it possible for a communication signal to jump from Beijing to New York in the "blink of an eye?"

DC Circuits > Circuit Variables > SI Units
Keywords:
  • communication satellite,
  • eye blink
  • algebra
Length: 2:19    Date Added: 2007-05-23 20:24:04    Filename: cktvars_units_ex4    ID: 248
Category: Week 2/
diagram_thumbnail Problem 1

This is a tutorial introducing the concept of polar coordinates in reference to complex numbers.

Tutorials > Complex Numbers > Polar Coordinates
Keywords:
  • Complex Arithmetic
Length: 13:47    Date Added: 2007-05-23 20:24:04    Filename: complex_polar_ex1    ID: 55
diagram_thumbnail Problem 2

This is a tutorial about how to perform mathematical operations on complex numbers in polar form.

Tutorials > Complex Numbers > Polar Coordinates
Keywords:
  • Complex Arithmetic
Length: 6:27    Date Added: 2007-05-23 20:24:04    Filename: complex_polar_ex2    ID: 56
diagram_thumbnail Problem 1

This is a tutorial introducing the idea of complex numbers and how they're represented graphically.

Tutorials > Complex Numbers > Rectangular Coordinates
Keywords:
  • Complex Arithmetic
Length: 8:17    Date Added: 2006-08-29 13:31:22    Filename: complex_rect_ex1    ID: 57
diagram_thumbnail Problem 2

This is a tutorial that shows how to perform arithmetic operations on complex numbers in the rectangular form.

Tutorials > Complex Numbers > Rectangular Coordinates
Keywords:
  • Complex Arithmetic
Length: 9:24    Date Added: 2007-05-23 20:24:04    Filename: complex_rect_ex2    ID: 58
diagram_thumbnail Problem 1

Given this voltage waveform applied across a 1 μF capacitor, find the current through the capacitor.

DC Circuits > Energy Storage Elements > Current-Voltage Relationship of Capacitors
Keywords:
  • Capacitor,
  • Waveform
,
  • V-I Capacitor Relationship
,
  • Calculus,
  • Algebra,
  • Graphing
Length: 7:44    Date Added: 2007-05-23 20:24:04    Filename: energyStorage_capacitorVi_ex1    ID: 95
diagram_thumbnail Problem 2

Given this current waveform applied to a 10μF capacitor, find the capacitor's voltage as a function of time, given that v(0) = 0 volts.

DC Circuits > Energy Storage Elements > Current-Voltage Relationship of Capacitors
Keywords:
  • Capacitor,
  • Waveform
,
  • V-I Capacitor Relationship
,
  • Calculus,
  • Algebra
Length: 8:38    Date Added: 2007-05-23 20:24:04    Filename: energyStorage_capacitorVi_ex2    ID: 96
diagram_thumbnail Problem 1

Given the waveform of current through an inductor, find the voltage across the inductor as a function of time.

DC Circuits > Energy Storage Elements > Current-Voltage Relationship of Inductors
Keywords:
  • Inductor,
  • Waveform
,
  • V-I Inductor Relationship
,
  • Calculus,
  • Algebra,
  • Graphing
Length: 11:02    Date Added: 2007-05-23 20:24:04    Filename: energyStorage_inductorVi_ex1    ID: 103
diagram_thumbnail Problem 2

Given the voltage waveform applied across an inductor and that i(0) = 0, find i(t) for a 5H inductor.

DC Circuits > Energy Storage Elements > Current-Voltage Relationship of Inductors
Keywords:
  • Inductor,
  • Waveform
,
  • V-I Inductor Relationship
,
  • Calculus,
  • Algebra,
  • Graphing
Length: 8:59    Date Added: 2007-05-23 20:24:04    Filename: energyStorage_inductorVi_ex2    ID: 104
diagram_thumbnail Problem 1

Determine the following properties for each of the given sinusoidal voltages: amplitude, peak-to-peak value, cyclic frequency (in Hz), angular frequency (in rad/s), period, and phase.

AC Circuits > Sinusoids > Properties
Keywords:
Length: 3:35    Date Added: 2007-07-26 13:38:14    Filename: ac_sinusoids_properties_ex1_eng    ID: 352
diagram_thumbnail Problem 2

Given the table that describes three sinusoidal currents. Write the mathematical expression for each current in the form i(t) = Imcos(ωt+Φ).

AC Circuits > Sinusoids > Properties
Keywords:
Length: 3:03    Date Added: 2007-07-26 13:49:49    Filename: ac_sinusoids_properties_ex2_eng    ID: 353
diagram_thumbnail Problem 3

Express the voltage v(t) in the form Vmcos(ωt+Φ)

AC Circuits > Sinusoids > Properties
Keywords:
Length: 4:14    Date Added: 2007-07-26 13:55:48    Filename: ac_sinusoids_properties_ex3_eng    ID: 354
Category: Week 3/
diagram_thumbnail Problem 1

Find the value of V0.

DC Circuits > Resistive Circuits > Kirchhoff's Current and Voltage Laws
Keywords:
  • Independent Voltage Source,
  • Resistor,
  • Independent Current Source
,
  • Kirchhoff's Current Law,
  • Kirchhoff's Voltage Law
,
  • Algebra
Length: 6:49    Date Added: 2006-08-29 13:31:14    Filename: resistive_kclKvl_ex1    ID: 20
diagram_thumbnail Problem 2

Find the current through the 10 kΩ resistor.

DC Circuits > Resistive Circuits > Kirchhoff's Current and Voltage Laws
Keywords:
  • Independent Voltage Source,
  • Dependent Current Source,
  • Resistor
,
  • Kirchhoff's Current Law,
  • Kirchhoff's Voltage Law,
  • Ohm's Law
,
  • Algebra
Length: 5:39    Date Added: 2007-05-23 20:24:04    Filename: resistive_kclKvl_ex2    ID: 21
diagram_thumbnail Problem 3

Find the current through the 300 Ω resistor.

DC Circuits > Resistive Circuits > Kirchhoff's Current and Voltage Laws
Keywords:
  • Independent Current Source,
  • Resistor,
  • Dependent Voltage Source
,
  • Kirchhoff's Current Law,
  • Kirchhoff's Voltage Law,
  • Ohm's Law
,
  • Algebra
Length: 8:48    Date Added: 2007-05-23 20:24:04    Filename: resistive_kclKvl_ex3    ID: 22
diagram_thumbnail Problem 1

Determine the current through each of the resistors in this circuit.

DC Circuits > Resistive Circuits > Kirchhoff's Current Law
Keywords:
  • Resistor,
  • Independent Current Source,
  • Dependent Current Source
,
  • Kirchhoff's current law,
  • Ohm's law
,
  • Algebra
Length: 4:37    Date Added: 2007-05-23 20:24:04    Filename: resistive_kcl_ex1    ID: 23
diagram_thumbnail Problem 4

A circuit analysis program tells us that v1 = 2V, v2 = 2V, v3 = -5V, v4 = 8V, and V5 = 5V. Test whether this is correct.

DC Circuits > Resistive Circuits > Kirchhoff's Current and Voltage Laws
Keywords:
  • Independent Current Source,
  • Independent Voltage Source,
  • Dependent Voltage Source,
  • Resistor
,
  • Kirchhoff's Current Law
,
  • Algebra
Length: 6:27    Date Added: 2007-05-23 20:24:04    Filename: resistive_kclKvl_ex4    ID: 74
diagram_thumbnail Problem 1

Find the voltage across resistor R0.

DC Circuits > Resistive Circuits > Kirchhoff's Voltage Law
Keywords:
  • Independent Voltage Source,
  • Dependent Voltage Source,
  • Resistor
,
  • Kirchhoff's Voltage Law
,
  • Algebra
Length: 7:54    Date Added: 2007-05-23 20:24:04    Filename: resistive_kvl_ex1    ID: 75
diagram_thumbnail Problem 5

Find the currents i1, i2, and i3 using KCL.

DC Circuits > Resistive Circuits > Kirchhoff's Current and Voltage Laws
Keywords:
  • generic element
  • algebra
Length: 5:41    Date Added: 2007-05-23 20:24:04    Filename: resistive_kclKvl_ex5    ID: 105
diagram_thumbnail Problem 1

Find the current i through the 7kΩ resistor using current division.

DC Circuits > Resistive Circuits > Current Divider
Keywords:
  • Resistor
,
  • Current Divider Formulas
,
  • Algebra
Length: 5:32    Date Added: 2006-08-29 13:31:46    Filename: resistive_currentDivider_ex1    ID: 174
diagram_thumbnail Problem 2

Given that i = 6mA, v = 6V, 2i1 = 3i2, i2 = 2i3, v4:v3 = 2:1, we need to specify the resistors to meet the following specification.

DC Circuits > Resistive Circuits > Current Divider
Keywords:
  • Resistor
,
  • Current Divider Formulas
,
  • Algebra
Length: 9:22    Date Added: 2007-05-23 20:24:04    Filename: resistive_currentDivider_ex2    ID: 175
diagram_thumbnail Problem 1

Use voltage division to find the current i through the 30 kΩ resistor and the voltage v across the 6 kΩ resistor.

DC Circuits > Resistive Circuits > Voltage Divider
Keywords:
  • Resistor
,
  • Voltage Divider Formulas
,
  • Algebra
Length: 6:05    Date Added: 2007-05-23 20:24:04    Filename: resistive_viDivider_ex1    ID: 176
diagram_thumbnail Problem 1

Use current division and voltage division to find the voltage vab across terminals a-b.

DC Circuits > Resistive Circuits > Voltage Divider
Keywords:
  • Resistor
,
  • Voltage Divider Formulas
,
  • Algebra
Length: 5:44    Date Added: 2007-05-23 20:24:04    Filename: resistive_viDivider_ex2    ID: 177
diagram_thumbnail Problem 1

Use voltage division to find the current i through the 30 kΩ resistor and the voltage v across the 6 kΩ resistor.

DC Circuits > Resistive Circuits > Voltage Divider
Keywords:
  • Resistor
,
  • Voltage Divider Formulas
,
  • Algebra
Length: 8:39    Date Added: 2007-05-23 20:24:04    Filename: resistive_voltDivider_ex1    ID: 178
Category: Week 4/
diagram_thumbnail Problem 7

Simplify the circuit between terminals a and b.

DC Circuits > Resistive Circuits > Equivalent Resistance
Keywords:
  • Resistor
,
  • Delta-Wye Resistor Simplifications,
  • Series-Parallel Resistor Combinations
,
  • Algebra
Length: 5:15    Date Added: 2007-05-23 20:24:04    Filename: resistive_equivResistance_ex7    ID: 19
diagram_thumbnail Problem 1

Find the equivalent resistance at terminals a and b.

DC Circuits > Resistive Circuits > Equivalent Resistance
Keywords:
  • Resistor
,
  • Equivalent Resistor Formulas
,
  • Algebra
Length: 3:36    Date Added: 2006-08-29 13:31:25    Filename: resistive_equivResistance_ex1    ID: 70
diagram_thumbnail Problem 2

Reduce the circuit to a single resistor at terminals a and b.

DC Circuits > Resistive Circuits > Equivalent Resistance
Keywords:
  • Resistor
,
  • Equivalent Resistor Formulas
,
  • Algebra
Length: 3:41    Date Added: 2007-05-23 20:24:04    Filename: resistive_equivResistance_ex2    ID: 71
diagram_thumbnail Problem 3

Find the current i in the circuit.

DC Circuits > Resistive Circuits > Equivalent Resistance
Keywords:
  • Resistor,
  • Independent Voltage Source
,
  • Equivalent resistor formulas,
  • Ohm's law
,
  • Algebra
Length: 5:43    Date Added: 2007-05-23 20:24:04    Filename: resistive_equivResistance_ex3    ID: 72
diagram_thumbnail Problem 4

Obtain the equivalent resistance at terminals a-b.

DC Circuits > Resistive Circuits > Equivalent Resistance
Keywords:
  • Resistor
,
  • Equivalent Resistance Formulas
,
  • Algebra
Length: 6:08    Date Added: 2007-05-23 20:24:04    Filename: resistive_equivResistance_ex4    ID: 73
diagram_thumbnail Problem 1

Find the equivalent capacitance across terminals a and b.

DC Circuits > Energy Storage Elements > Equivalent Capacitance
Keywords:
  • Capacitor
,
  • Equivalent Capacitance
,
  • Algebra
Length: 5:26    Date Added: 2007-05-23 20:24:04    Filename: energyStorage_equivCapac_ex1    ID: 99
diagram_thumbnail Problem 2

Find the equivalent capacitance seen by the voltage source.

DC Circuits > Energy Storage Elements > Equivalent Capacitance
Keywords:
  • Independent Voltage Source,
  • Capacitor
,
  • Equivalent Capacitance
,
  • Algebra
Length: 5:39    Date Added: 2007-05-23 20:24:04    Filename: energyStorage_equivCapac_ex2    ID: 100
diagram_thumbnail Problem 1

Find the equivalent inductance across terminals a and b.

DC Circuits > Energy Storage Elements > Equivalent Inductance
Keywords:
  • Inductor
,
  • Series-Parallel Inductor Combinations
,
  • Algebra
Length: 4:41    Date Added: 2007-05-23 20:24:04    Filename: energyStorage_equivInduc_ex1    ID: 101
diagram_thumbnail Problem 1

Find the current i through the 7kΩ resistor using current division.

DC Circuits > Resistive Circuits > Current Divider
Keywords:
  • Resistor
,
  • Current Divider Formulas
,
  • Algebra
Length: 5:32    Date Added: 2006-08-29 13:31:46    Filename: resistive_currentDivider_ex1    ID: 174
diagram_thumbnail Problem 2

Given that i = 6mA, v = 6V, 2i1 = 3i2, i2 = 2i3, v4:v3 = 2:1, we need to specify the resistors to meet the following specification.

DC Circuits > Resistive Circuits > Current Divider
Keywords:
  • Resistor
,
  • Current Divider Formulas
,
  • Algebra
Length: 9:22    Date Added: 2007-05-23 20:24:04    Filename: resistive_currentDivider_ex2    ID: 175
diagram_thumbnail Problem 1

Use voltage division to find the current i through the 30 kΩ resistor and the voltage v across the 6 kΩ resistor.

DC Circuits > Resistive Circuits > Voltage Divider
Keywords:
  • Resistor
,
  • Voltage Divider Formulas
,
  • Algebra
Length: 6:05    Date Added: 2007-05-23 20:24:04    Filename: resistive_viDivider_ex1    ID: 176
diagram_thumbnail Problem 1

Use current division and voltage division to find the voltage vab across terminals a-b.

DC Circuits > Resistive Circuits > Voltage Divider
Keywords:
  • Resistor
,
  • Voltage Divider Formulas
,
  • Algebra
Length: 5:44    Date Added: 2007-05-23 20:24:04    Filename: resistive_viDivider_ex2    ID: 177
diagram_thumbnail Problem 1

Use voltage division to find the current i through the 30 kΩ resistor and the voltage v across the 6 kΩ resistor.

DC Circuits > Resistive Circuits > Voltage Divider
Keywords:
  • Resistor
,
  • Voltage Divider Formulas
,
  • Algebra
Length: 8:39    Date Added: 2007-05-23 20:24:04    Filename: resistive_voltDivider_ex1    ID: 178
Category: Week 5/
diagram_thumbnail Problem 5

How should the value of the variable voltage source Vx be adjusted to cause the voltage at node M to be zero?

DC Circuits > Nodal Analysis > Grounded Voltage Sources
Keywords:
  • variable voltage source,
  • resistor,
  • circuit design
,
  • Use nodal analysis and find a relationship between Vx and Vc
,
  • Algebra
Length: 3:21    Date Added: 2007-05-23 20:24:04    Filename: nodal_gndvs_5    ID: 3
diagram_thumbnail Problem 4

Find the value of R that will make VC = 8 volts. For this value of R, find VB and VA.

DC Circuits > Nodal Analysis > Grounded Voltage Sources
Keywords:
  • resistor,
  • independent voltage source
,
  • nodal analysis
,
  • algebra
Length: 5:04    Date Added: 2007-05-23 20:24:04    Filename: nodal_gndvs_4    ID: 4
diagram_thumbnail Problem 3

Find the indicated currents; use the node voltage method first.

DC Circuits > Nodal Analysis > Grounded Voltage Sources
Keywords:
  • independent voltage source,
  • independent current source,
  • resistor
,
  • nodal analysis
,
  • algebra
Length: 5:31    Date Added: 2007-05-23 20:24:04    Filename: nodal_gndvs_3    ID: 6
diagram_thumbnail Problem 3

Determine which sources are delivering power and which sources are absorbing power.

DC Circuits > Nodal Analysis > Independent Current Sources
Keywords:
  • resistor,
  • independent current source
,
  • nodal analysis
,
  • algebra
Length: 8:11    Date Added: 2007-05-23 20:24:04    Filename: nodal_indcs_3    ID: 7
diagram_thumbnail Problem 1

(a) Does the circuit have a "floating voltage source" which would require the "supernode" technique for nodal analysis?

(b) Write the nodal equations for this circuit.

DC Circuits > Nodal Analysis > Floating Voltage Sources (Supernodes)
Keywords:
  • resistor,
  • independent voltage source
,
  • nodal analysis
,
  • algebra
Length: 3:04    Date Added: 2007-05-23 20:24:04    Filename: nodal_super_1    ID: 9
diagram_thumbnail Problem 2

Find all the node voltages in the circuit.

DC Circuits > Nodal Analysis > Grounded Voltage Sources
Keywords:
  • independent current source,
  • independent voltage source,
  • resistors
,
  • nodal analysis
,
  • algebra
Length: 4:42    Date Added: 2007-05-23 20:24:04    Filename: nodal_gndvs_2    ID: 11
diagram_thumbnail Problem 4

Find the three indicated node voltages using the node voltage method.

DC Circuits > Nodal Analysis > Independent Current Sources
Keywords:
  • resistors,
  • independent current source
,
  • nodal analysis
,
  • algebra
Length: 3:59    Date Added: 2007-05-23 20:24:04    Filename: nodal_indcs_4    ID: 12
diagram_thumbnail Problem 1

Determine the number of nodes in each circuit, and draw a closed contour around each node.

DC Circuits > Nodal Analysis > Counting Nodes
Keywords:
  • Independent Voltage Source,
  • Resistor
,
  • Definition of Node
Length: 3:17    Date Added: 2007-05-23 20:24:04    Filename: nodal_count_ex1    ID: 48
diagram_thumbnail Problem 2

Determine the number of nodes in this circuit, and draw a closed contour around each node.

DC Circuits > Nodal Analysis > Counting Nodes
Keywords:
  • Independent Voltage Source,
  • Resistor
,
  • Definition of Node
Length: 1:37    Date Added: 2007-05-23 20:24:04    Filename: nodal_count_ex2    ID: 49
diagram_thumbnail Problem 3

Determine the number of nodes in this circuit, and draw a closed contour around each node.

DC Circuits > Nodal Analysis > Counting Nodes
Keywords:
  • Independent Voltage Source,
  • Resistor
,
  • Definition of Node
Length: 2:32    Date Added: 2007-05-23 20:24:04    Filename: nodal_count_ex3    ID: 50
diagram_thumbnail Problem 1

Using nodal analysis, find the power delivered or absorbed by each element.

DC Circuits > Nodal Analysis > Independent Current Sources
Keywords:
  • Independent Current Source,
  • Resistor
,
  • Nodal Analysis
,
  • Algebra
Length: 9:05    Date Added: 2007-05-23 20:24:04    Filename: nodal_indcs_ex1    ID: 51
diagram_thumbnail Problem 2

Use the node with the most connected branches as the ground reference, and then determine the remaining node voltages.

DC Circuits > Nodal Analysis > Independent Current Sources
Keywords:
  • Independent Current Source,
  • Resistor
,
  • Nodal Analysis
,
  • Algebra
Length: 7:36    Date Added: 2006-08-29 13:31:21    Filename: nodal_indcs_ex2    ID: 52
diagram_thumbnail Problem 2

Use nodal analysis to determine the resistors that absorb the most and least power.

DC Circuits > Nodal Analysis > Floating Voltage Sources (Supernodes)
Keywords:
  • Independent Voltage Source,
  • Resistor
,
  • Nodal Analysis,
  • Supernode Analysis,
  • Power Formulas
,
  • Algebra
Length: 7:13    Date Added: 2007-05-23 20:24:04    Filename: nodal_super_ex2    ID: 67
diagram_thumbnail Problem 3

Write the nodal equations for this circuit.

DC Circuits > Nodal Analysis > Floating Voltage Sources (Supernodes)
Keywords:
  • Independent Voltage Source,
  • Resistor,
  • Independent Current Source,
  • Battery
,
  • Nodal Analysis,
  • Supernode Analysis
Length: 3:09    Date Added: 2007-05-23 20:24:04    Filename: nodal_super_ex3    ID: 68
diagram_thumbnail Problem 1

Find the three indicated node voltages using the node voltage method.

DC Circuits > Nodal Analysis > Grounded Voltage Sources
Keywords:
  • resistor,
  • power supply,
  • node voltage
,
  • Nodal Analysis
,
  • algebra
Length: 5:19    Date Added: 2007-05-23 20:24:04    Filename: nodal_gndvs_1    ID: 240
Category: Week 6/
diagram_thumbnail Problem 1

Use mesh current analysis to find Vx.

DC Circuits > Mesh Analysis > Dependent Sources
Keywords:
  • resistor,
  • independent voltage source,
  • dependent current source
,
  • Mesh Current Analysis, Ohm's Law, Kirchhoff's Voltage Law
,
  • Algebra
Length: 3:37    Date Added: 2007-05-23 20:24:04    Filename: mesh_dep_ex1    ID: 5
diagram_thumbnail Problem 1

Use nodal analysis to determine whether the dependent voltage source is absorbing or delivering power to the rest of the circuit.

DC Circuits > Nodal Analysis > Dependent Sources
Keywords:
  • resistor,
  • dependent voltage source,
  • independent current source
,
  • nodal analysis
,
  • algebra
Length: 6:41    Date Added: 2007-05-23 20:24:04    Filename: nodal_dep_1    ID: 8
diagram_thumbnail Problem 1

Use mesh current analysis to find the voltage across each resistor.

DC Circuits > Mesh Analysis > Independent Voltage Sources
Keywords:
  • Resistor,
  • Independent Voltage Source
,
  • Mesh Current Analysis, Ohm's Law, Kirchhoff's Voltage Law
,
  • Algebra
Length: 4:18    Date Added: 2006-08-29 13:31:12    Filename: mesh_indvs_ex1    ID: 10
diagram_thumbnail Problem 2

Use mesh analysis to determine the two defined currents, Ix and Iy.

DC Circuits > Mesh Analysis > Independent Voltage Sources
Keywords:
  • Independent Voltage Source,
  • Resistor
,
  • Mesh Current Analysis,
  • Ohm's Law,
,
  • Algebra,
  • Matrix Algebra
Length: 5:38    Date Added: 2007-05-23 20:24:04    Filename: mesh_indvs_ex2    ID: 60
diagram_thumbnail Problem 3

Determine all of the mesh currents in the circuit.

DC Circuits > Mesh Analysis > Independent Voltage Sources
Keywords:
  • Independent Voltage Source,
  • Resistor
,
  • Mesh Current Analysis,
  • Ohm's Law,
,
  • Algebra,
  • Matrix Algebra
Length: 5:13    Date Added: 2007-05-23 20:24:04    Filename: mesh_indvs_ex3    ID: 61
diagram_thumbnail Problem 1

Determine all of the mesh currents in the circuit.

DC Circuits > Mesh Analysis > Current Source in Single Mesh
Keywords:
  • Independent Voltage Source,
  • Resistor,
  • Independent Current Source
,
  • Mesh Current Analysis, Ohm's Law, Kirchhoff's Voltage Law
,
  • Algebra
Length: 4:29    Date Added: 2007-05-23 20:24:04    Filename: mesh_owncs_ex1    ID: 62
diagram_thumbnail Problem 2

Use mesh current analysis to find Vz.

DC Circuits > Mesh Analysis > Current Source in Single Mesh
Keywords:
  • Independent Current Source,
  • Resistor
,
  • Mesh Current Analysis, Ohm's Law, Kirchhoff's Voltage Law
,
  • Algebra
Length: 5:10    Date Added: 2007-05-23 20:24:04    Filename: mesh_owncs_ex2    ID: 63
diagram_thumbnail Problem 1

Use mesh current analysis to find the power associated with each voltage source.

DC Circuits > Mesh Analysis > Current Source in Two Meshes (Supermeshes)
Keywords:
  • Independent Voltage Source,
  • Resistor,
  • Independent Current Source
,
  • Mesh Current Analysis,
  • Ohm's Law,
  • Kirchhoff's Voltage Law,
  • Power Equations
,
  • Algebra
Length: 6:05    Date Added: 2007-05-23 20:24:04    Filename: mesh_sharedcs_ex1    ID: 64
diagram_thumbnail Problem 2

Determine each mesh current in this circuit.

DC Circuits > Mesh Analysis > Current Source in Two Meshes (Supermeshes)
Keywords:
  • Independent Current Source,
  • Resistor
,
  • Mesh Current Analysis,
  • Ohm's Law,
  • Kirchhoff's Voltage Law
,
  • Algebra,
  • Matrix Algebra
Length: 3:42    Date Added: 2007-05-23 20:24:04    Filename: mesh_sharedcs_ex2    ID: 65
diagram_thumbnail Problem 3

Use mesh analysis to find Vx and Iy.

DC Circuits > Mesh Analysis > Current Source in Two Meshes (Supermeshes)
Keywords:
  • Independent Voltage Source,
  • Resistor,
  • Independent Current Source
,
  • Mesh Current Analysis,
  • Ohm's Law,
  • Kirchhoff's Voltage Law
,
  • Algebra,
  • Matrix Algebra
Length: 6:36    Date Added: 2007-05-23 20:24:04    Filename: mesh_sharedcs_ex3    ID: 66
diagram_thumbnail Problem 3

Use mesh current analysis to find the phasor voltages V1 and V2.

AC Circuits > Phasors > Mesh Analysis
Keywords:
Length: 5:23    Date Added: 2007-07-26 11:50:15    Filename: ac_phasors_mesh_ex3_eng    ID: 341
diagram_thumbnail Problem 1

Find the steady-state sinusoidal current i(t) using mesh current analysis.

AC Circuits > Phasors > Mesh Analysis
Keywords:
Length: 6:14    Date Added: 2007-07-27 09:47:18    Filename: ac_phasors_mesh_ex1_eng    ID: 366
diagram_thumbnail Problem 2

Use mesh current analysis to find the phasor current I and the phasor voltages V1 and V2.

AC Circuits > Phasors > Mesh Analysis
Keywords:
Length: 6:56    Date Added: 2007-07-27 09:56:15    Filename: ac_phasors_mesh_ex2_eng    ID: 367
diagram_thumbnail Problem 4

Find the current I using mesh current analysis.

AC Circuits > Phasors > Mesh Analysis
Keywords:
Length: 4:43    Date Added: 2007-07-27 10:06:25    Filename: ac_phasors_mesh_ex4_eng    ID: 369
diagram_thumbnail Problem 5

Find the indicated mesh currents.

AC Circuits > Phasors > Mesh Analysis
Keywords:
Length: 5:50    Date Added: 2007-07-27 10:10:25    Filename: ac_phasors_mesh_ex5_eng    ID: 372
diagram_thumbnail Problem 1

Apply repeated source transformations to reduce this to an equivalent circuit at the terminals G-H. The simplified circuit will consist of a voltage source in series with two series-connected passive elements.

AC Circuits > Phasors > Source Transformations
Keywords:
Length: 4:24    Date Added: 2007-07-27 10:37:11    Filename: ac_phasors_srctrans_ex1_eng    ID: 374
diagram_thumbnail Problem 2

Apply repeated source transformations to reduce this to an equivalent circuit at the terminals J-K. The simplified circuit will consist of a current source in parallel with two series-connected passive elements.

AC Circuits > Phasors > Source Transformations
Keywords:
Length: 5:16    Date Added: 2007-07-27 10:55:45    Filename: ac_phasors_srctrans_ex2_eng    ID: 375
diagram_thumbnail Problem 4

Find all of the node voltages in the circuit.

AC Circuits > Phasors > Nodal Analysis
Keywords:
Length: 3:01    Date Added: 2007-07-31 13:20:55    Filename: ac_phasors_nodal_ex4_eng    ID: 410
diagram_thumbnail Problem 5

Find the indicated currents expressed as cosine functions. Use the node voltage analysis method first.

AC Circuits > Phasors > Nodal Analysis
Keywords:
Length: 7:19    Date Added: 2007-07-31 14:29:03    Filename: ac_phasors_nodal_ex5_eng    ID: 411
diagram_thumbnail Problem 6

Use nodal analysis to determine which impedance element has the lowest voltage magnitude across its terminals.

AC Circuits > Phasors > Nodal Analysis
Keywords:
Length: 6:01    Date Added: 2007-07-31 15:16:16    Filename: ac_phasors_nodal_ex6_eng    ID: 412
diagram_thumbnail Problem 1

Find the steady-state sinusoidal voltages v1(t) and v2(t) using node voltage analysis.

AC Circuits > Phasors > Nodal Analysis
Keywords:
Length: 6:30    Date Added: 2007-08-03 14:30:09    Filename: ac_phasors_nodal_ex1_eng    ID: 450
diagram_thumbnail Problem 2

Find the steady-state sinusoidal voltages v1(t), v2(t), and v3(t) using node voltage analysis.

AC Circuits > Phasors > Nodal Analysis
Keywords:
Length: 7:29    Date Added: 2007-08-03 14:30:18    Filename: ac_phasors_nodal_ex2_eng    ID: 451
diagram_thumbnail Problem 3

Find the steady-state sinusoidal voltages v1(t) and v2(t) using node voltage analysis.

AC Circuits > Phasors > Nodal Analysis
Keywords:
Length: 5:15    Date Added: 2007-08-03 14:30:24    Filename: ac_phasors_nodal_ex3_eng    ID: 452
Category: Week 7/
diagram_thumbnail Problem 2

Use repeated source transformations to convert this circuit into Norton form.

DC Circuits > Source Transformations > Single Source
Keywords:
  • independent current source,
  • resistor
,
  • source transformation
,
  • algebra
Length: 3:10    Date Added: 2007-05-23 20:24:04    Filename: srcTrans_res_ex2    ID: 41
diagram_thumbnail Problem 3

Use repeated source transformations to convert this circuit into Thèvenin form.

DC Circuits > Source Transformations > Single Source
Keywords:
  • independent voltage source,
  • resistor
,
  • source transformation
,
  • algebra
Length: 2:45    Date Added: 2007-05-23 20:24:04    Filename: srcTrans_res_ex3    ID: 42
diagram_thumbnail Problem 4

Use repeated source transformations to convert this circuit into Thevenin form.

DC Circuits > Source Transformations > Multiple Sources
Keywords:
  • Independent Current Source,
  • Independent Voltage Source,
  • Resistor
,
  • Source Transformations,
  • Parallel Resistor and Current Source Combinations
,
  • Algebra
Length: 3:35    Date Added: 2006-08-29 13:31:25    Filename: srcTrans_ex4    ID: 69
diagram_thumbnail Problem 5

Use repeated source transformations to convert this circuit into Thevenin form.

DC Circuits > Source Transformations > Multiple Sources
Keywords:
  • Independent Current Source,
  • Independent Voltage Source,
  • Resistor
,
  • Source Transformations,
  • Series and Parallel Resistor and Current Source Combinations
,
  • Algebra
Length: 4:53    Date Added: 2007-05-23 20:24:04    Filename: srcTrans_ex5    ID: 77
diagram_thumbnail Problem 6

Use repeated source transformations to convert this circuit into Norton form.

DC Circuits > Source Transformations > Multiple Sources
Keywords:
  • Independent Current Source,
  • Independent Voltage Source,
  • Resistor
,
  • Source Transformations,
  • Parallel Resistor and Current Source Combinations
,
  • Algebra
Length: 3:55    Date Added: 2007-05-23 20:24:04    Filename: srcTrans_ex6    ID: 78
diagram_thumbnail Problem 1

Find the Thèvenin equivalent circuit at the terminals S-T.

DC Circuits > Thèvenin Equivalents > Dependent Sources Exclusively
Keywords:
  • Dependent Voltage Source,
  • Resistor
,
  • Thèvenin Equivalents,
  • KVL,
  • KCL
,
  • Algebra
Length: 5:59    Date Added: 2007-05-23 20:24:04    Filename: thev_dep_ex1    ID: 88
diagram_thumbnail Problem 2

Find the Thèvenin equivalent circuit at the terminals U-V.

DC Circuits > Thèvenin Equivalents > Dependent Sources Exclusively
Keywords:
  • Dependent Voltage Source,
  • Resistor
,
  • Thèvenin Equivalents,
  • KVL,
  • KCL
,
  • Algebra
Length: 3:17    Date Added: 2007-05-23 20:24:04    Filename: thev_dep_ex2    ID: 89
diagram_thumbnail Problem 1

Find the Thèvenin equivalent at the terminals A-B. Use two different methods to find the Thèvenin resistance:

(a) As a ratio of short-circuit current and open-circuit voltage, and

(b) as the lookback resistance.

DC Circuits > Thèvenin Equivalents > Independent Sources
Keywords:
  • Independent Voltage Source,
  • Resistor
,
  • Thèvenin Equivalents,
  • Voltage Divider,
  • Resistor Combination,
  • Lookback Resistance
,
  • Algebra
Length: 5:09    Date Added: 2007-05-23 20:24:04    Filename: thev_ind_ex1    ID: 90
diagram_thumbnail Problem 2

Find the Thèvenin equivalent circuit to the left of the terminals A-B.

DC Circuits > Thèvenin Equivalents > Independent Sources
Keywords:
  • Independent Voltage Source,
  • Resistor
,
  • Thèvenin Equivalents,
  • Lookback Resistance
,
  • Algebra
Length: 2:38    Date Added: 2007-05-23 20:24:04    Filename: thev_ind_ex2    ID: 91
diagram_thumbnail Problem 3

Find the Thèvenin equivalent circuit at the terminals A-B.

DC Circuits > Thèvenin Equivalents > Independent Sources
Keywords:
  • Independent Current Source,
  • Resistor
,
  • Thèvenin Equivalents,
  • Lookback Resistance,
  • Resistor Combinations,
  • Current Divider
,
  • Algebra
Length: 4:52    Date Added: 2007-05-23 20:24:04    Filename: thev_ind_ex3    ID: 92
diagram_thumbnail Problem 4

Find the Thèvenin equivalent circuit at the terminals E-F.

DC Circuits > Thèvenin Equivalents > Independent Sources
Keywords:
  • Independent Current Source,
  • Resistor,
  • Independent Voltage Source
,
  • Thèvenin Equivalents,
  • Lookback Resistance,
  • Resistor Combinations,
  • Superposition,
  • Delta-Wye Conversion,
  • Current Divider
,
  • Algebra
Length: 8:34    Date Added: 2007-05-23 20:24:04    Filename: thev_ind_ex4    ID: 93
diagram_thumbnail Problem 1

Find the Thèvenin equivalent circuit at the terminals G-H.

DC Circuits > Thèvenin Equivalents > Independent and Dependent Sources
Keywords:
  • Independent Current Source,
  • Resistor,
  • Independent Voltage Source
,
  • Thèvenin Equivalents,
  • KVL
,
  • Algebra
Length: 5:52    Date Added: 2007-05-23 20:24:04    Filename: thev_inddep_ex1    ID: 94
diagram_thumbnail Problem 1

Use repeated source transformations to convert this circuit into Norton form.

DC Circuits > Source Transformations > Single Source
Keywords:
  • independent current source,
  • resistor
,
  • source transformation
,
  • algebra
Length: 2:24    Date Added: 2007-05-23 20:24:04    Filename: srcTrans_res_ex1    ID: 254
diagram_thumbnail Problem 1

Use superposition to determine the voltage VX. State which source influences VX the most.

DC Circuits > Superposition > Two Sources
Keywords:
  • independent current source,
  • independent voltage source,
  • resistor
,
  • superposition
,
  • algebra
Length: 5:38    Date Added: 2007-05-23 20:24:04    Filename: super_ex1    ID: 255
diagram_thumbnail Problem 2

Use superposition to determine the current I. State which source influences I the most.

DC Circuits > Superposition > Three Sources
Keywords:
  • independent current source,
  • independent voltage source,
  • resistor
,
  • superposition
,
  • algebra
Length: 9:04    Date Added: 2007-05-23 20:24:04    Filename: super_ex2    ID: 256
diagram_thumbnail Problem 3

Use superposition to determine the voltage VX.

DC Circuits > Superposition > Two Sources
Keywords:
  • battery,
  • resistor
,
  • superposition
,
  • algebra
Length: 5:28    Date Added: 2007-05-23 20:24:04    Filename: super_ex3    ID: 257
diagram_thumbnail Problem 2

Find the Norton equivalent circuit at the terminals Q-R. Express all complex values in your answer in both rectangular and polar form.

AC Circuits > Phasors > Norton Equivalents
Keywords:
Length: 3:38    Date Added: 2007-07-26 11:43:37    Filename: ac_phasors_norton_ex2_eng    ID: 340
diagram_thumbnail Problem 2

Find the Thevenin equivalent circuit at the terminals Q-R. Express all complex values in your answer in both rectangular and polar form.

AC Circuits > Phasors > Thevenin Equivalents
Keywords:
Length: 3:01    Date Added: 2007-07-26 13:11:27    Filename: ac_phasors_thev_ex2_eng    ID: 345
diagram_thumbnail Problem 1

Find the Norton equivalent circuit at the terminals F-G. Express all complex values in your solution in both rectangular and polar form.

AC Circuits > Phasors > Norton Equivalents
Keywords:
Length: 3:25    Date Added: 2007-07-27 10:17:26    Filename: ac_phasors_norton_ex1_eng    ID: 373
diagram_thumbnail Problem 1

Find the Thevenin equivalent circuit at the terminals F-G. Express all complex values in your solution in both rectangular and polar form.

AC Circuits > Phasors > Thevenin Equivalents
Keywords:
Length: 3:57    Date Added: 2007-07-27 11:09:03    Filename: ac_phasors_thev_ex1_eng    ID: 376
diagram_thumbnail Problem 1

Determine the impedance ZL that results in the maximum average power transferred to ZL. What is the maximum average power transferred to the load impedance?

AC Circuits > Power > Maximum Power Tranfer
Keywords:
Length: 7:37    Date Added: 2007-08-03 14:28:43    Filename: ac_power_maxtransfer_ex1_eng    ID: 441
diagram_thumbnail Problem 2

Determine settings of R and L that will result in the maximum average power transferred to R if is = 1 cos(1000t) mA and vs = 30 cos(1000t+30°) V. What is the maximum average power transferred to R?

AC Circuits > Power > Maximum Power Tranfer
Keywords:
Length: 8:12    Date Added: 2007-08-03 14:28:52    Filename: ac_power_maxtransfer_ex2_eng    ID: 442
Category: Week 8/
diagram_thumbnail Problem 2

Find the voltage v(t) using the superposition method.

AC Circuits > Phasors > Superposition
Keywords:
Length: 8:10    Date Added: 2007-07-26 13:06:14    Filename: ac_phasors_super_ex2_eng    ID: 344
diagram_thumbnail Problem 1

Find the average power absorbed by resistor, inductor and the capacitor in the circuit if v = 4 cos (2000t) V.

AC Circuits > Power > Average Power
Keywords:
Length: 7:41    Date Added: 2007-07-27 13:55:40    Filename: ac_power_avg_ex1_eng    ID: 400
diagram_thumbnail Problem 1

Find the current i(t) using the superposition method. Write it in the form IMcos(ωt+θ°).

AC Circuits > Phasors > Superposition
Keywords:
Length: 6:04    Date Added: 2007-07-27 14:12:23    Filename: ac_phasors_super_ex1_eng    ID: 405
Category: Week 9/
diagram_thumbnail Problem 1

Find the apparent power absorbed by the load in the circuit if v = 4 cos

(3000t+30°) V.

AC Circuits > Power > Apparent Power
Keywords:
Length: 6:54    Date Added: 2007-07-26 13:14:53    Filename: ac_power_app_ex1_eng    ID: 346
diagram_thumbnail Problem 1

The load in the circuit absorbs an average power of 80 W and a reactive power of 60 VAR. What is the power factor of the load? What are the values of the resistor and the inductor if v = 110 cos (2π60t) V?

AC Circuits > Power > Power Factor
Keywords:
Length: 5:15    Date Added: 2007-07-26 13:18:13    Filename: ac_power_pf_ex1_eng    ID: 347
diagram_thumbnail Problem 2

Three 220 Vrms loads are connected in parallel. Load 1 absorbs an average power of 800 W and a reactive power of 200 VAR. Load 2 absorbs an average power of 600 W at 0.6 lagging power factor. Load 3 is a 80 Ω resistor in series with a capacitive reactance of 60  Ω. What is the pf of the equivalent load as seen by the voltage source?

AC Circuits > Power > Power Factor
Keywords:
Length: 6:48    Date Added: 2007-07-26 13:20:54    Filename: ac_power_pf_ex2_eng    ID: 348
diagram_thumbnail Problem 3

In the circuit, Z1=100+j60 Ω and Z2=10-j20 Ω. Calculate the pf of the equivalent

load as seen by the voltage source and the total complex power delivered by the voltage source.

AC Circuits > Power > Power Factor
Keywords:
Length: 4:27    Date Added: 2007-07-26 13:23:55    Filename: ac_power_pf_ex3_eng    ID: 349
diagram_thumbnail Problem 1

The periodic current is applied to a 10 kΩ resistor. Find the average power consumed by the resistor.

AC Circuits > Power > RMS Value
Keywords:
Length: 5:51    Date Added: 2007-07-26 13:29:46    Filename: ac_power_rms_ex1_eng    ID: 350
diagram_thumbnail Problem 1

Find the average power, the reactive power and the complex power delivered by the voltage source if v = 6 cos (1000t) V.

AC Circuits > Power > Complex Power
Keywords:
Length: 5:24    Date Added: 2007-07-26 13:32:13    Filename: ac_power_s_ex1_eng    ID: 351
diagram_thumbnail Problem 1

In the circuit, a 110 Vrms load is fed from a transmission line having a impedance of 4 + j1 Ω. The load absorbs an average power of 8 kW at a lagging pf of 0.8.

a) Determine the apparent power required to supply the load and the average power lost in the transmission line.

b) Compute the value of a capacitor that would correct the power factor to 1 if placed in parallel with the load. Recompute the values in (a) for the load with the corrected power factor.

AC Circuits > Power > Power Factor Correction
Keywords:
Length: 7:12    Date Added: 2007-07-27 14:04:30    Filename: ac_power_pfcorr_ex1_eng    ID: 402
diagram_thumbnail Problem 2

Three 100 Vrms loads are connected in parallel. Load 1 is a 50 Ω resistor in series with an inductive reactance of 40 Ω. Load 2 absorbs an average power of 500 W at 0.75 lagging power factor. Load 3 absorbs an apparent power of 600 VA at 0.9 lagging power factor. Assume the circuit is operating at 60 Hz. Compute the value of a capacitor that would correct the power factor to 1 if placed in parallel with the loads.

AC Circuits > Power > Power Factor Correction
Keywords:
Length: 7:50    Date Added: 2007-07-27 14:06:48    Filename: ac_power_pfcorr_ex2_eng    ID: 403
Category: Week 10/
diagram_thumbnail Problem 2

In this problem, well assume that both operational amplifiers are ideal. We want to determine the output voltage VO.

DC Circuits > Operational Amplifiers > Inverting
Keywords:
  • two stage,
  • operational amplifier,
  • feedback resistor,
  • voltage gain,
  • Av
,
  • Ideal opamp model
,
  • algebra
Length: 5:40    Date Added: 2007-05-23 20:24:04    Filename: opAmp_inv_ex2    ID: 16
diagram_thumbnail Problem 1

In this problem, we assume the operational amplifier is ideal, we are interested in the voltage across the 1kΩ resistor.

DC Circuits > Operational Amplifiers > Inverting
Keywords:
  • single stage,
  • operational amplifier
,
  • Ideal opamp model
,
  • algebra
Length: 5:39    Date Added: 2006-08-29 13:31:16    Filename: opAmp_inv_ex1    ID: 30
diagram_thumbnail Problem 1

An inverting amplifier circuit is given in figure 1.

a) Assume the op amp is ideal and determine vo .

b) Replace the operational amplifier by the finite gain model shown in figure 2. Assuming the parameters of the op amp are Ri = 100, Ro = 100, and A = 100,000, repeat the analysis and find vo.

DC Circuits > Operational Amplifiers > Modeling
Keywords:
  • single stage,
  • operational amplifier
,
  • Ideal opamp model
,
  • algebra
Length: 8:51    Date Added: 2007-05-23 20:24:04    Filename: opAmp_model_ex1    ID: 172
diagram_thumbnail Problem 2

An non-inverting amplifier circuit is given in figure 1.

a) If the load resistor RL = 1, determine vo assuming the op amp is ideal. Repeat the analysis for RL = 100.

b) Replace the operational amplifier by the finite gain model shown in figure 2. Assume the parameters of the op amp are Ri = 100, Ro = 100, and A = 100,000. Repeat the analysis of a).

DC Circuits > Operational Amplifiers > Modeling
Keywords:
  • single stage,
  • operational amplifier
,
  • Ideal opamp model
,
  • algebra
Length: 8:40    Date Added: 2007-05-23 20:24:04    Filename: opAmp_model_ex2    ID: 173
diagram_thumbnail Problem 1

Find the current through the 6kΩ resistor.

DC Circuits > Operational Amplifiers > Noninverting
Keywords:
  • noninverting,
  • operational amplifier
,
  • Ideal opamp model
,
  • algebra
Length: 5:06    Date Added: 2007-05-23 20:24:04    Filename: opAmp_nonInv_ex1    ID: 213
diagram_thumbnail Problem 2

Calculate the output voltage vo

DC Circuits > Operational Amplifiers > Noninverting
Keywords:
  • noninverting,
  • operational amplifier
,
  • Ideal opamp model
,
  • algebra
Length: 4:37    Date Added: 2007-05-23 20:24:04    Filename: opAmp_nonInv_ex2    ID: 214
diagram_thumbnail Problem 2

Find the voltage gain and phase shift of this circuit.

AC Circuits > Phasors > Operational Amplifiers
Keywords:
Length: 2:59    Date Added: 2007-07-26 12:59:19    Filename: ac_phasors_opamps_ex2_eng    ID: 342
diagram_thumbnail Problem 4

Suppose this circuit is driven by a sinusoidal voltage source operating at 200 Hz. Determine the gain and phase shift of the circuit.

AC Circuits > Phasors > Operational Amplifiers
Keywords:
Length: 3:54    Date Added: 2007-07-26 13:02:14    Filename: ac_phasors_opamps_ex4_eng    ID: 343
diagram_thumbnail Problem 1

Find the output voltage vo(t) using phasor analysis.

AC Circuits > Phasors > Operational Amplifiers
Keywords:
Length: 3:16    Date Added: 2007-07-27 10:07:11    Filename: ac_phasors_opamps_ex1_eng    ID: 370
diagram_thumbnail Problem 3

At what frequency (in Hz) will the magnitude of the gain be 0.707?

AC Circuits > Phasors > Operational Amplifiers
Keywords:
Length: 5:03    Date Added: 2007-07-27 14:08:46    Filename: ac_phasors_opamps_ex3_eng    ID: 404
Category: Labs/
diagram_thumbnail Problem 1

Read the resistor color codes to determine their values and tolerances. Report the values using engineering prefix notation, i.e., ohms, kilo-ohms, or mega-ohms.

DC Circuits > Circuit Elements > Resistor Color Codes
Keywords:
  • Resistor
,
  • Color Code Chart
,
  • Algebra
Length: 4:36    Date Added: 2006-08-29 13:31:19    Filename: cktels_resistorCode_ex1    ID: 43
diagram_thumbnail Problem 2

Find the maximum and minimum specified resistance for each resistor.

DC Circuits > Circuit Elements > Resistor Color Codes
Keywords:
  • Resistor
,
  • Color Code Chart
,
  • Algebra
Length: 4:40    Date Added: 2007-05-23 20:24:04    Filename: cktels_resistorCode_ex2    ID: 44
diagram_thumbnail Problem 1

Based on the following measurements across a black box's terminals, determine what elements are inside it.

DC Circuits > Resistive Circuits > Ohm's law
Keywords:
  • Black Box
,
  • Ohm's Law
,
  • Algebra
Length: 5:10    Date Added: 2007-05-23 20:24:04    Filename: resistive_ohmLaw_ex1    ID: 76