1.

The voltage of an ac supply varies with time \[(t)\] as \[V=120\sin 100\,\pi \,t\cos 100\pi \,t.\] The maximum voltage and frequency respectively are   [MP PMT 2001; MP PET 2002]

A.            120 volts, 100 Hz                 
B.            \[\frac{120}{\sqrt{2}}\] volts, 100 Hz
C.            60 volts, 200 Hz                   
D.            60 volts, 100 Hz
Answer» E.


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