Alternating CurrentHard
Question
An alternating EMF of angular frequency w is applied across an inductance. The instantaneous power developed in the circuit has an angular frequency.
Options
A.ω/4
B.ω/2
C.ω
D.2ω
Solution
P = I2 R = (I0 sin ωt)2 R
P =
(1 − cos 2 ωt) R
here ω′ = 2ω f′ = 2f
P =
(1 − cos 2 ωt) R here ω′ = 2ω f′ = 2f
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