The potential difference V and the current i flowing through an instru – McqOptions

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1.	The potential difference V and the current i flowing through an instrument in an ac circuit of frequency f are given by \[V=5\cos \omega \,t\] volts and I = 2 sin wt amperes (where w = 2pf). The power dissipated in the instrument is [CPMT 1977, 80; MP PET 1999]
A.	Zero
B.	10 W
C.	5 W
D.	2.5 W
Answer» B. 10 W

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