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categoryهندسة كهربائية
schoolبكالوريوس
event_available2026-07-15
السؤال
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Learning Goal:
To calculate power in an AC circuit using time-varying voltage and current functions.
Before completing this tutorial, make sure you are familiar with instantaneous power, average power, and reactive power.
Part A - Calculating average and reactive power I
Calculate the average (P) and reactive (Q) power for the circuit element below.
Consider, v(t) = 3.5 cos(600t - 120°) V and i(t) = 2.3 cos(600t+45°) A
Enter a numerical with three significant figures.
16
v(t)
i(t)
P=
ELEMENT
reset
? help
W
Q=
VAR
Part B - Calculating power factor
Calculate the power factor for the circuit element below.
Consider, v(t) = 3.5 cos(600t - 120°) V and i(t) = 2.3 sin(600t+45°) A
Also identify if the power factor is leading, lagging, or neither leading nor lagging.
v(t)
i(t)
ELEMENT
Enter a numerical with three significant figures. Use the check box to indicate lagging or leading; Leave blank if neither lagging nor leading.
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