Q.

The voltage of an ac source varies with time according to the equation V=100sin⁡100πcos⁡100πt  where t is in seconds and V is in volts. Then

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a

The peak voltage of the source is 100 volts

b

The peak voltage of the source is 50 volts

c

The peak voltage of the source is  100/2volts

d

The frequency of the source is 50 Hz

answer is B.

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Detailed Solution

V=50×2sin⁡100πtcos⁡100πt=50sin⁡200πt⇒V0=50 Volts and v=100Hz
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The voltage of an ac source varies with time according to the equation V=100sin⁡100πcos⁡100πt  where t is in seconds and V is in volts. Then