Problem 1
Which devices are labeled according to the passive sign convention (PSC)?  
DC Circuits >
Circuit Variables >
Passive Sign Convention
Keywords:
Length: 1:40
Date Added: 20060829 13:31:10
Filename: cktvars_psc_ex1
ID: 2

Problem 1
(a) Suppose that a 12volt automobile battery with 100 amphour 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:
Length: 5:22
Date Added: 20070523 20:24:04
Filename: cktvars_energy_ex1
ID: 40

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:
Length: 3:45
Date Added: 20070523 20:24:04
Filename: cktvars_psc_ex2
ID: 46

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:
Length: 1:41
Date Added: 20070523 20:24:04
Filename: cktvars_psc_ex3
ID: 47

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:
Length: 1:17
Date Added: 20070523 20:24:04
Filename: cktels_cs_ex1
ID: 79

Problem 2
Which of the following circuit connections are invalid?  
DC Circuits >
Circuit Elements >
Current Sources
Keywords:
Length: 2:22
Date Added: 20070523 20:24:04
Filename: cktels_cs_ex2
ID: 80

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:
Length: 1:25
Date Added: 20070523 20:24:04
Filename: cktels_vs_ex1
ID: 81

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:
Length: 2:10
Date Added: 20070523 20:24:04
Filename: cktels_depcs_ex1
ID: 82

Problem 2
Which of the following circuit connections are invalid?  
DC Circuits >
Circuit Elements >
Voltage Sources
Keywords:
Length: 1:47
Date Added: 20070523 20:24:04
Filename: cktels_vs_ex2
ID: 85

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:
Length: 1:49
Date Added: 20070523 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 lightemitting 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 kilowatthour 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 LEDbased night light instead of the older style night light? 
DC Circuits >
Circuit Variables >
SI Units
Keywords:
Length: 4:20
Date Added: 20070523 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 highdefinition (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:
Length: 3:15
Date Added: 20070523 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 (3x10^{8} 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:
Length: 2:19
Date Added: 20070523 20:24:04
Filename: cktvars_units_ex4
ID: 248

Problem 1
This is a tutorial introducing the concept of polar coordinates in reference to complex numbers.  
Tutorials >
Complex Numbers >
Polar Coordinates
Keywords:
Length: 13:47
Date Added: 20070523 20:24:04
Filename: complex_polar_ex1
ID: 55

Problem 2
This is a tutorial about how to perform mathematical operations on complex numbers in polar form.  
Tutorials >
Complex Numbers >
Polar Coordinates
Keywords:
Length: 6:27
Date Added: 20070523 20:24:04
Filename: complex_polar_ex2
ID: 56

Problem 1
This is a tutorial introducing the idea of complex numbers and how they're represented graphically.  
Tutorials >
Complex Numbers >
Rectangular Coordinates
Keywords:
Length: 8:17
Date Added: 20060829 13:31:22
Filename: complex_rect_ex1
ID: 57

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:
Length: 9:24
Date Added: 20070523 20:24:04
Filename: complex_rect_ex2
ID: 58

Problem 1
Given this voltage waveform applied across a 1 μF capacitor, find the current through the capacitor.  
DC Circuits >
Energy Storage Elements >
CurrentVoltage Relationship of Capacitors
Keywords:
Length: 7:44
Date Added: 20070523 20:24:04
Filename: energyStorage_capacitorVi_ex1
ID: 95

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 >
CurrentVoltage Relationship of Capacitors
Keywords:
Length: 8:38
Date Added: 20070523 20:24:04
Filename: energyStorage_capacitorVi_ex2
ID: 96

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 >
CurrentVoltage Relationship of Inductors
Keywords:
Length: 11:02
Date Added: 20070523 20:24:04
Filename: energyStorage_inductorVi_ex1
ID: 103

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 >
CurrentVoltage Relationship of Inductors
Keywords:
Length: 8:59
Date Added: 20070523 20:24:04
Filename: energyStorage_inductorVi_ex2
ID: 104

Problem 1
Determine the following properties for each of the given sinusoidal voltages: amplitude, peaktopeak value, cyclic frequency (in Hz), angular frequency (in rad/s), period, and phase.  
AC Circuits >
Sinusoids >
Properties
Keywords:
Length: 3:35
Date Added: 20070726 13:38:14
Filename: ac_sinusoids_properties_ex1_eng
ID: 352

Problem 2
Given the table that describes three sinusoidal currents. Write the mathematical expression for each current in the form i(t) = I_{m}cos(ωt+Φ).  
AC Circuits >
Sinusoids >
Properties
Keywords:
Length: 3:03
Date Added: 20070726 13:49:49
Filename: ac_sinusoids_properties_ex2_eng
ID: 353

Problem 3
Express the voltage v(t) in the form V_{m}cos(ωt+Φ)  
AC Circuits >
Sinusoids >
Properties
Keywords:
Length: 4:14
Date Added: 20070726 13:55:48
Filename: ac_sinusoids_properties_ex3_eng
ID: 354

Problem 1
Find the value of V0.  
DC Circuits >
Resistive Circuits >
Kirchhoff's Current and Voltage Laws
Keywords:
Length: 6:49
Date Added: 20060829 13:31:14
Filename: resistive_kclKvl_ex1
ID: 20

Problem 2
Find the current through the 10 kΩ resistor.  
DC Circuits >
Resistive Circuits >
Kirchhoff's Current and Voltage Laws
Keywords:
Length: 5:39
Date Added: 20070523 20:24:04
Filename: resistive_kclKvl_ex2
ID: 21

Problem 3
Find the current through the 300 Ω resistor.  
DC Circuits >
Resistive Circuits >
Kirchhoff's Current and Voltage Laws
Keywords:
Length: 8:48
Date Added: 20070523 20:24:04
Filename: resistive_kclKvl_ex3
ID: 22

Problem 1
Determine the current through each of the resistors in this circuit.  
DC Circuits >
Resistive Circuits >
Kirchhoff's Current Law
Keywords:
Length: 4:37
Date Added: 20070523 20:24:04
Filename: resistive_kcl_ex1
ID: 23

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:
Length: 6:27
Date Added: 20070523 20:24:04
Filename: resistive_kclKvl_ex4
ID: 74

Problem 1
Find the voltage across resistor R0.  
DC Circuits >
Resistive Circuits >
Kirchhoff's Voltage Law
Keywords:
Length: 7:54
Date Added: 20070523 20:24:04
Filename: resistive_kvl_ex1
ID: 75

Problem 5
Find the currents i_{1}, i_{2}, and i_{3} using KCL.  
DC Circuits >
Resistive Circuits >
Kirchhoff's Current and Voltage Laws
Keywords:
Length: 5:41
Date Added: 20070523 20:24:04
Filename: resistive_kclKvl_ex5
ID: 105

Problem 1
Find the current i through the 7kΩ resistor using current division.  
DC Circuits >
Resistive Circuits >
Current Divider
Keywords:
Length: 5:32
Date Added: 20060829 13:31:46
Filename: resistive_currentDivider_ex1
ID: 174

Problem 2
Given that i = 6mA, v = 6V, 2i_{1} = 3i_{2}, i_{2} = 2i_{3}, v_{4}:v_{3} = 2:1, we need to specify the resistors to meet the following specification.  
DC Circuits >
Resistive Circuits >
Current Divider
Keywords:
Length: 9:22
Date Added: 20070523 20:24:04
Filename: resistive_currentDivider_ex2
ID: 175

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:
Length: 6:05
Date Added: 20070523 20:24:04
Filename: resistive_viDivider_ex1
ID: 176

Problem 1
Use current division and voltage division to find the voltage vab across terminals ab.  
DC Circuits >
Resistive Circuits >
Voltage Divider
Keywords:
Length: 5:44
Date Added: 20070523 20:24:04
Filename: resistive_viDivider_ex2
ID: 177

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:
Length: 8:39
Date Added: 20070523 20:24:04
Filename: resistive_voltDivider_ex1
ID: 178

Problem 7
Simplify the circuit between terminals a and b.  
DC Circuits >
Resistive Circuits >
Equivalent Resistance
Keywords:
Length: 5:15
Date Added: 20070523 20:24:04
Filename: resistive_equivResistance_ex7
ID: 19

Problem 1
Find the equivalent resistance at terminals a and b.  
DC Circuits >
Resistive Circuits >
Equivalent Resistance
Keywords:
Length: 3:36
Date Added: 20060829 13:31:25
Filename: resistive_equivResistance_ex1
ID: 70

Problem 2
Reduce the circuit to a single resistor at terminals a and b.  
DC Circuits >
Resistive Circuits >
Equivalent Resistance
Keywords:
Length: 3:41
Date Added: 20070523 20:24:04
Filename: resistive_equivResistance_ex2
ID: 71

Problem 3
Find the current i in the circuit.  
DC Circuits >
Resistive Circuits >
Equivalent Resistance
Keywords:
Length: 5:43
Date Added: 20070523 20:24:04
Filename: resistive_equivResistance_ex3
ID: 72

Problem 4
Obtain the equivalent resistance at terminals ab.  
DC Circuits >
Resistive Circuits >
Equivalent Resistance
Keywords:
Length: 6:08
Date Added: 20070523 20:24:04
Filename: resistive_equivResistance_ex4
ID: 73

Problem 1
Find the equivalent capacitance across terminals a and b.  
DC Circuits >
Energy Storage Elements >
Equivalent Capacitance
Keywords:
Length: 5:26
Date Added: 20070523 20:24:04
Filename: energyStorage_equivCapac_ex1
ID: 99

Problem 2
Find the equivalent capacitance seen by the voltage source.  
DC Circuits >
Energy Storage Elements >
Equivalent Capacitance
Keywords:
Length: 5:39
Date Added: 20070523 20:24:04
Filename: energyStorage_equivCapac_ex2
ID: 100

Problem 1
Find the equivalent inductance across terminals a and b.  
DC Circuits >
Energy Storage Elements >
Equivalent Inductance
Keywords:
Length: 4:41
Date Added: 20070523 20:24:04
Filename: energyStorage_equivInduc_ex1
ID: 101

Problem 1
Find the current i through the 7kΩ resistor using current division.  
DC Circuits >
Resistive Circuits >
Current Divider
Keywords:
Length: 5:32
Date Added: 20060829 13:31:46
Filename: resistive_currentDivider_ex1
ID: 174

Problem 2
Given that i = 6mA, v = 6V, 2i_{1} = 3i_{2}, i_{2} = 2i_{3}, v_{4}:v_{3} = 2:1, we need to specify the resistors to meet the following specification.  
DC Circuits >
Resistive Circuits >
Current Divider
Keywords:
Length: 9:22
Date Added: 20070523 20:24:04
Filename: resistive_currentDivider_ex2
ID: 175

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:
Length: 6:05
Date Added: 20070523 20:24:04
Filename: resistive_viDivider_ex1
ID: 176

Problem 1
Use current division and voltage division to find the voltage vab across terminals ab.  
DC Circuits >
Resistive Circuits >
Voltage Divider
Keywords:
Length: 5:44
Date Added: 20070523 20:24:04
Filename: resistive_viDivider_ex2
ID: 177

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:
Length: 8:39
Date Added: 20070523 20:24:04
Filename: resistive_voltDivider_ex1
ID: 178

Problem 5
How should the value of the variable voltage source V_{x} be adjusted to cause the voltage at node M to be zero?  
DC Circuits >
Nodal Analysis >
Grounded Voltage Sources
Keywords:
Length: 3:21
Date Added: 20070523 20:24:04
Filename: nodal_gndvs_5
ID: 3

Problem 4
Find the value of R that will make V_{C} = 8 volts. For this value of R, find V_{B} and V_{A}.  
DC Circuits >
Nodal Analysis >
Grounded Voltage Sources
Keywords:
Length: 5:04
Date Added: 20070523 20:24:04
Filename: nodal_gndvs_4
ID: 4

Problem 3
Find the indicated currents; use the node voltage method first.  
DC Circuits >
Nodal Analysis >
Grounded Voltage Sources
Keywords:
Length: 5:31
Date Added: 20070523 20:24:04
Filename: nodal_gndvs_3
ID: 6

Problem 3
Determine which sources are delivering power and which sources are absorbing power.  
DC Circuits >
Nodal Analysis >
Independent Current Sources
Keywords:
Length: 8:11
Date Added: 20070523 20:24:04
Filename: nodal_indcs_3
ID: 7

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:
Length: 3:04
Date Added: 20070523 20:24:04
Filename: nodal_super_1
ID: 9

Problem 2
Find all the node voltages in the circuit.  
DC Circuits >
Nodal Analysis >
Grounded Voltage Sources
Keywords:
Length: 4:42
Date Added: 20070523 20:24:04
Filename: nodal_gndvs_2
ID: 11

Problem 4
Find the three indicated node voltages using the node voltage method.  
DC Circuits >
Nodal Analysis >
Independent Current Sources
Keywords:
Length: 3:59
Date Added: 20070523 20:24:04
Filename: nodal_indcs_4
ID: 12

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:
Length: 3:17
Date Added: 20070523 20:24:04
Filename: nodal_count_ex1
ID: 48

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:
Length: 1:37
Date Added: 20070523 20:24:04
Filename: nodal_count_ex2
ID: 49

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:
Length: 2:32
Date Added: 20070523 20:24:04
Filename: nodal_count_ex3
ID: 50

Problem 1
Using nodal analysis, find the power delivered or absorbed by each element.  
DC Circuits >
Nodal Analysis >
Independent Current Sources
Keywords:
Length: 9:05
Date Added: 20070523 20:24:04
Filename: nodal_indcs_ex1
ID: 51

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:
Length: 7:36
Date Added: 20060829 13:31:21
Filename: nodal_indcs_ex2
ID: 52

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:
Length: 7:13
Date Added: 20070523 20:24:04
Filename: nodal_super_ex2
ID: 67

Problem 3
Write the nodal equations for this circuit.  
DC Circuits >
Nodal Analysis >
Floating Voltage Sources (Supernodes)
Keywords:
Length: 3:09
Date Added: 20070523 20:24:04
Filename: nodal_super_ex3
ID: 68

Problem 1
Find the three indicated node voltages using the node voltage method.  
DC Circuits >
Nodal Analysis >
Grounded Voltage Sources
Keywords:
Length: 5:19
Date Added: 20070523 20:24:04
Filename: nodal_gndvs_1
ID: 240

Problem 1
Use mesh current analysis to find Vx.  
DC Circuits >
Mesh Analysis >
Dependent Sources
Keywords:
Length: 3:37
Date Added: 20070523 20:24:04
Filename: mesh_dep_ex1
ID: 5

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:
Length: 6:41
Date Added: 20070523 20:24:04
Filename: nodal_dep_1
ID: 8

Problem 1
Use mesh current analysis to find the voltage across each resistor.  
DC Circuits >
Mesh Analysis >
Independent Voltage Sources
Keywords:
Length: 4:18
Date Added: 20060829 13:31:12
Filename: mesh_indvs_ex1
ID: 10

Problem 2
Use mesh analysis to determine the two defined currents, Ix and Iy.  
DC Circuits >
Mesh Analysis >
Independent Voltage Sources
Keywords:
Length: 5:38
Date Added: 20070523 20:24:04
Filename: mesh_indvs_ex2
ID: 60

Problem 3
Determine all of the mesh currents in the circuit.  
DC Circuits >
Mesh Analysis >
Independent Voltage Sources
Keywords:
Length: 5:13
Date Added: 20070523 20:24:04
Filename: mesh_indvs_ex3
ID: 61

Problem 1
Determine all of the mesh currents in the circuit.  
DC Circuits >
Mesh Analysis >
Current Source in Single Mesh
Keywords:
Length: 4:29
Date Added: 20070523 20:24:04
Filename: mesh_owncs_ex1
ID: 62

Problem 2
Use mesh current analysis to find Vz.  
DC Circuits >
Mesh Analysis >
Current Source in Single Mesh
Keywords:
Length: 5:10
Date Added: 20070523 20:24:04
Filename: mesh_owncs_ex2
ID: 63

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:
Length: 6:05
Date Added: 20070523 20:24:04
Filename: mesh_sharedcs_ex1
ID: 64

Problem 2
Determine each mesh current in this circuit.  
DC Circuits >
Mesh Analysis >
Current Source in Two Meshes (Supermeshes)
Keywords:
Length: 3:42
Date Added: 20070523 20:24:04
Filename: mesh_sharedcs_ex2
ID: 65

Problem 3
Use mesh analysis to find Vx and Iy.  
DC Circuits >
Mesh Analysis >
Current Source in Two Meshes (Supermeshes)
Keywords:
Length: 6:36
Date Added: 20070523 20:24:04
Filename: mesh_sharedcs_ex3
ID: 66

Problem 3
Use mesh current analysis to find the phasor voltages V_{1} and V_{2}.  
AC Circuits >
Phasors >
Mesh Analysis
Keywords:
Length: 5:23
Date Added: 20070726 11:50:15
Filename: ac_phasors_mesh_ex3_eng
ID: 341

Problem 1
Find the steadystate sinusoidal current i(t) using mesh current analysis.  
AC Circuits >
Phasors >
Mesh Analysis
Keywords:
Length: 6:14
Date Added: 20070727 09:47:18
Filename: ac_phasors_mesh_ex1_eng
ID: 366

Problem 2
Use mesh current analysis to find the phasor current I and the phasor voltages V_{1} and V_{2}.  
AC Circuits >
Phasors >
Mesh Analysis
Keywords:
Length: 6:56
Date Added: 20070727 09:56:15
Filename: ac_phasors_mesh_ex2_eng
ID: 367

Problem 4
Find the current I using mesh current analysis.  
AC Circuits >
Phasors >
Mesh Analysis
Keywords:
Length: 4:43
Date Added: 20070727 10:06:25
Filename: ac_phasors_mesh_ex4_eng
ID: 369

Problem 5
Find the indicated mesh currents.  
AC Circuits >
Phasors >
Mesh Analysis
Keywords:
Length: 5:50
Date Added: 20070727 10:10:25
Filename: ac_phasors_mesh_ex5_eng
ID: 372

Problem 1
Apply repeated source transformations to reduce this to an equivalent circuit at the terminals GH. The simplified circuit will consist of a voltage source in series with two seriesconnected passive elements.  
AC Circuits >
Phasors >
Source Transformations
Keywords:
Length: 4:24
Date Added: 20070727 10:37:11
Filename: ac_phasors_srctrans_ex1_eng
ID: 374

Problem 2
Apply repeated source transformations to reduce this to an equivalent circuit at the terminals JK. The simplified circuit will consist of a current source in parallel with two seriesconnected passive elements.  
AC Circuits >
Phasors >
Source Transformations
Keywords:
Length: 5:16
Date Added: 20070727 10:55:45
Filename: ac_phasors_srctrans_ex2_eng
ID: 375

Problem 4
Find all of the node voltages in the circuit.  
AC Circuits >
Phasors >
Nodal Analysis
Keywords:
Length: 3:01
Date Added: 20070731 13:20:55
Filename: ac_phasors_nodal_ex4_eng
ID: 410

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: 20070731 14:29:03
Filename: ac_phasors_nodal_ex5_eng
ID: 411

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: 20070731 15:16:16
Filename: ac_phasors_nodal_ex6_eng
ID: 412

Problem 1
Find the steadystate sinusoidal voltages v_{1}(t) and v_{2}(t) using node voltage analysis.  
AC Circuits >
Phasors >
Nodal Analysis
Keywords:
Length: 6:30
Date Added: 20070803 14:30:09
Filename: ac_phasors_nodal_ex1_eng
ID: 450

Problem 2
Find the steadystate sinusoidal voltages v_{1}(t), v_{2}(t), and v_{3}(t) using node voltage analysis.  
AC Circuits >
Phasors >
Nodal Analysis
Keywords:
Length: 7:29
Date Added: 20070803 14:30:18
Filename: ac_phasors_nodal_ex2_eng
ID: 451

Problem 3
Find the steadystate sinusoidal voltages v_{1}(t) and v_{2}(t) using node voltage analysis.  
AC Circuits >
Phasors >
Nodal Analysis
Keywords:
Length: 5:15
Date Added: 20070803 14:30:24
Filename: ac_phasors_nodal_ex3_eng
ID: 452

Problem 2
Use repeated source transformations to convert this circuit into Norton form.  
DC Circuits >
Source Transformations >
Single Source
Keywords:
Length: 3:10
Date Added: 20070523 20:24:04
Filename: srcTrans_res_ex2
ID: 41

Problem 3
Use repeated source transformations to convert this circuit into Thèvenin form.  
DC Circuits >
Source Transformations >
Single Source
Keywords:
Length: 2:45
Date Added: 20070523 20:24:04
Filename: srcTrans_res_ex3
ID: 42

Problem 4
Use repeated source transformations to convert this circuit into Thevenin form.  
DC Circuits >
Source Transformations >
Multiple Sources
Keywords:
Length: 3:35
Date Added: 20060829 13:31:25
Filename: srcTrans_ex4
ID: 69

Problem 5
Use repeated source transformations to convert this circuit into Thevenin form.  
DC Circuits >
Source Transformations >
Multiple Sources
Keywords:
Length: 4:53
Date Added: 20070523 20:24:04
Filename: srcTrans_ex5
ID: 77

Problem 6
Use repeated source transformations to convert this circuit into Norton form.  
DC Circuits >
Source Transformations >
Multiple Sources
Keywords:
Length: 3:55
Date Added: 20070523 20:24:04
Filename: srcTrans_ex6
ID: 78

Problem 1
Find the ThÃ¨venin equivalent circuit at the terminals ST.  
DC Circuits >
ThÃ¨venin Equivalents >
Dependent Sources Exclusively
Keywords:
Length: 5:59
Date Added: 20070523 20:24:04
Filename: thev_dep_ex1
ID: 88

Problem 2
Find the ThÃ¨venin equivalent circuit at the terminals UV.  
DC Circuits >
ThÃ¨venin Equivalents >
Dependent Sources Exclusively
Keywords:
Length: 3:17
Date Added: 20070523 20:24:04
Filename: thev_dep_ex2
ID: 89

Problem 1
Find the ThÃ¨venin equivalent at the terminals AB. Use two different methods to find the ThÃ¨venin resistance: (a) As a ratio of shortcircuit current and opencircuit voltage, and (b) as the lookback resistance.  
DC Circuits >
ThÃ¨venin Equivalents >
Independent Sources
Keywords:
Length: 5:09
Date Added: 20070523 20:24:04
Filename: thev_ind_ex1
ID: 90

Problem 2
Find the ThÃ¨venin equivalent circuit to the left of the terminals AB.  
DC Circuits >
ThÃ¨venin Equivalents >
Independent Sources
Keywords:
Length: 2:38
Date Added: 20070523 20:24:04
Filename: thev_ind_ex2
ID: 91

Problem 3
Find the ThÃ¨venin equivalent circuit at the terminals AB.  
DC Circuits >
ThÃ¨venin Equivalents >
Independent Sources
Keywords:
Length: 4:52
Date Added: 20070523 20:24:04
Filename: thev_ind_ex3
ID: 92

Problem 4
Find the ThÃ¨venin equivalent circuit at the terminals EF.  
DC Circuits >
ThÃ¨venin Equivalents >
Independent Sources
Keywords:
Length: 8:34
Date Added: 20070523 20:24:04
Filename: thev_ind_ex4
ID: 93

Problem 1
Find the ThÃ¨venin equivalent circuit at the terminals GH.  
DC Circuits >
ThÃ¨venin Equivalents >
Independent and Dependent Sources
Keywords:
Length: 5:52
Date Added: 20070523 20:24:04
Filename: thev_inddep_ex1
ID: 94

Problem 1
Use repeated source transformations to convert this circuit into Norton form.  
DC Circuits >
Source Transformations >
Single Source
Keywords:
Length: 2:24
Date Added: 20070523 20:24:04
Filename: srcTrans_res_ex1
ID: 254

Problem 1
Use superposition to determine the voltage V_{X}. State which source influences V_{X} the most.  
DC Circuits >
Superposition >
Two Sources
Keywords:
Length: 5:38
Date Added: 20070523 20:24:04
Filename: super_ex1
ID: 255

Problem 2
Use superposition to determine the current I. State which source influences I the most.  
DC Circuits >
Superposition >
Three Sources
Keywords:
Length: 9:04
Date Added: 20070523 20:24:04
Filename: super_ex2
ID: 256

Problem 3
Use superposition to determine the voltage V_{X}.  
DC Circuits >
Superposition >
Two Sources
Keywords:
Length: 5:28
Date Added: 20070523 20:24:04
Filename: super_ex3
ID: 257

Problem 2
Find the Norton equivalent circuit at the terminals QR. Express all complex values in your answer in both rectangular and polar form.  
AC Circuits >
Phasors >
Norton Equivalents
Keywords:
Length: 3:38
Date Added: 20070726 11:43:37
Filename: ac_phasors_norton_ex2_eng
ID: 340

Problem 2
Find the Thevenin equivalent circuit at the terminals QR. Express all complex values in your answer in both rectangular and polar form.  
AC Circuits >
Phasors >
Thevenin Equivalents
Keywords:
Length: 3:01
Date Added: 20070726 13:11:27
Filename: ac_phasors_thev_ex2_eng
ID: 345

Problem 1
Find the Norton equivalent circuit at the terminals FG. Express all complex values in your solution in both rectangular and polar form.  
AC Circuits >
Phasors >
Norton Equivalents
Keywords:
Length: 3:25
Date Added: 20070727 10:17:26
Filename: ac_phasors_norton_ex1_eng
ID: 373

Problem 1
Find the Thevenin equivalent circuit at the terminals FG. Express all complex values in your solution in both rectangular and polar form.  
AC Circuits >
Phasors >
Thevenin Equivalents
Keywords:
Length: 3:57
Date Added: 20070727 11:09:03
Filename: ac_phasors_thev_ex1_eng
ID: 376

Problem 1
Determine the impedance Z_{L} that results in the maximum average power transferred to Z_{L}. What is the maximum average power transferred to the load impedance?  
AC Circuits >
Power >
Maximum Power Tranfer
Keywords:
Length: 7:37
Date Added: 20070803 14:28:43
Filename: ac_power_maxtransfer_ex1_eng
ID: 441

Problem 2
Determine settings of R and L that will result in the maximum average power transferred to R if i_{s} = 1 cos(1000t) mA and v_{s} = 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: 20070803 14:28:52
Filename: ac_power_maxtransfer_ex2_eng
ID: 442

Problem 2
Find the voltage v(t) using the superposition method.  
AC Circuits >
Phasors >
Superposition
Keywords:
Length: 8:10
Date Added: 20070726 13:06:14
Filename: ac_phasors_super_ex2_eng
ID: 344

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: 20070727 13:55:40
Filename: ac_power_avg_ex1_eng
ID: 400

Problem 1
Find the current i(t) using the superposition method. Write it in the form I_{M}cos(ωt+θ°).  
AC Circuits >
Phasors >
Superposition
Keywords:
Length: 6:04
Date Added: 20070727 14:12:23
Filename: ac_phasors_super_ex1_eng
ID: 405

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: 20070726 13:14:53
Filename: ac_power_app_ex1_eng
ID: 346

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: 20070726 13:18:13
Filename: ac_power_pf_ex1_eng
ID: 347

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: 20070726 13:20:54
Filename: ac_power_pf_ex2_eng
ID: 348

Problem 3
In the circuit, Z1=100+j60 Ω and Z2=10j20 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: 20070726 13:23:55
Filename: ac_power_pf_ex3_eng
ID: 349

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: 20070726 13:29:46
Filename: ac_power_rms_ex1_eng
ID: 350

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: 20070726 13:32:13
Filename: ac_power_s_ex1_eng
ID: 351

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: 20070727 14:04:30
Filename: ac_power_pfcorr_ex1_eng
ID: 402

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: 20070727 14:06:48
Filename: ac_power_pfcorr_ex2_eng
ID: 403

Problem 2
In this problem, we’ll assume that both operational amplifiers are ideal. We want to determine the output voltage V_{O}.  
DC Circuits >
Operational Amplifiers >
Inverting
Keywords:
Length: 5:40
Date Added: 20070523 20:24:04
Filename: opAmp_inv_ex2
ID: 16

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:
Length: 5:39
Date Added: 20060829 13:31:16
Filename: opAmp_inv_ex1
ID: 30

Problem 1
An inverting amplifier circuit is given in figure 1. a) Assume the op amp is ideal and determine v_{o} . b) Replace the operational amplifier by the finite gain model shown in figure 2. Assuming the parameters of the op amp are R_{i} = 100kΩ, R_{o} = 100kΩ, and A = 100,000, repeat the analysis and find v_{o}.  
DC Circuits >
Operational Amplifiers >
Modeling
Keywords:
Length: 8:51
Date Added: 20070523 20:24:04
Filename: opAmp_model_ex1
ID: 172

Problem 2
An noninverting amplifier circuit is given in figure 1. a) If the load resistor R_{L} = 1kΩ, determine v_{o} assuming the op amp is ideal. Repeat the analysis for R_{L} = 100kΩ. b) Replace the operational amplifier by the finite gain model shown in figure 2. Assume the parameters of the op amp are R_{i} = 100kΩ, R_{o} = 100kΩ, and A = 100,000. Repeat the analysis of a).  
DC Circuits >
Operational Amplifiers >
Modeling
Keywords:
Length: 8:40
Date Added: 20070523 20:24:04
Filename: opAmp_model_ex2
ID: 173

Problem 1
Find the current through the 6kΩ resistor.  
DC Circuits >
Operational Amplifiers >
Noninverting
Keywords:
Length: 5:06
Date Added: 20070523 20:24:04
Filename: opAmp_nonInv_ex1
ID: 213

Problem 2
Calculate the output voltage v_{o}  
DC Circuits >
Operational Amplifiers >
Noninverting
Keywords:
Length: 4:37
Date Added: 20070523 20:24:04
Filename: opAmp_nonInv_ex2
ID: 214

Problem 2
Find the voltage gain and phase shift of this circuit.  
AC Circuits >
Phasors >
Operational Amplifiers
Keywords:
Length: 2:59
Date Added: 20070726 12:59:19
Filename: ac_phasors_opamps_ex2_eng
ID: 342

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: 20070726 13:02:14
Filename: ac_phasors_opamps_ex4_eng
ID: 343

Problem 1
Find the output voltage v_{o}(t) using phasor analysis.  
AC Circuits >
Phasors >
Operational Amplifiers
Keywords:
Length: 3:16
Date Added: 20070727 10:07:11
Filename: ac_phasors_opamps_ex1_eng
ID: 370

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: 20070727 14:08:46
Filename: ac_phasors_opamps_ex3_eng
ID: 404

Problem 1
Read the resistor color codes to determine their values and tolerances. Report the values using engineering prefix notation, i.e., ohms, kiloohms, or megaohms.  
DC Circuits >
Circuit Elements >
Resistor Color Codes
Keywords:
Length: 4:36
Date Added: 20060829 13:31:19
Filename: cktels_resistorCode_ex1
ID: 43

Problem 2
Find the maximum and minimum specified resistance for each resistor.  
DC Circuits >
Circuit Elements >
Resistor Color Codes
Keywords:
Length: 4:40
Date Added: 20070523 20:24:04
Filename: cktels_resistorCode_ex2
ID: 44

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:
Length: 5:10
Date Added: 20070523 20:24:04
Filename: resistive_ohmLaw_ex1
ID: 76
