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
|
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
|
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
|
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
|
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
|
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
|
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
|
Problem 1
Calculate the instantaneous power at the terminals of the network if v = 10 cos(2π 60t + 130°) V, i = 1 cos(2π 60t + 60°) mA | |
AC Circuits >
Power >
Instantaneous Power
Keywords:
Length: 4:54
Date Added: 2007-07-27 13:59:59
Filename: ac_power_inst_ex1_eng
ID: 401
|
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
|
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
|
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
|
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
|