Questions  

The voltage of an ac supply varies with time(t) as V=120sin100πtcos100πt.  The maximum voltage and frequency respectively are 

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By Expert Faculty of Sri Chaitanya
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a
120 volts, 100 Hz
b
1202volts, 100 Hz
c
60 volts, 200 Hz
d
60 volts, 100 Hz
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detailed solution

Correct option is D

V=120  sin100πt  cos 100 πt⇒ V =60 sin 200πt Vmax=60V  andν=100Hz


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