If the frequency of the
source emf in an AC circuit is n, the power varies with a frequency
n
2n
n/2
zero
Answers
Answered by
1
Answer:
The average power is given as,
P
avg
=VIcosϕ
=(V
0
sinωt)(I
0
sinωt)cosϕ
=(V
0
I
0
sin
2
ωt)cosϕ
=(V
0
I
0
)(
2
1−cos2ωt
)cosϕ
Substitute the ω=2πn in the above expression, we get
P
avg
=(V
0
I
0
)(
2
1−cos4πn
)cosϕ
P
avg
=(V
0
I
0
)(
2
1−cos2(2πn)
)cosϕ
Thus, power varies with a frequency of 2n.
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