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Problem 1
Find the apparent power absorbed by the load in the circuit if v = 4 cos (3000t+30°) V. |
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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
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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? |
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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
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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? |
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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
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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. |
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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
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Problem 1
The periodic current is applied to a 10 kΩ resistor. Find the average power consumed by the resistor. |
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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
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Problem 1
Find the average power, the reactive power and the complex power delivered by the voltage source if v = 6 cos (1000t) V. |
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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
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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. |
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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
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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. |
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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
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