Questions
The peak value of an alternating emf E given by is 10 V and frequency is 50 HZ. At time t = (1/600) s, the instantaneous value of emf is
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a
10 V
b
53V
c
5 V
d
1 V
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Correct option is B
Given that E0=10 V,t=1600s∴E=E0cos 2πft=10 cos2π×50×1600=10 cos π/6 = 103/2=53 V
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