Question #42025

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 t volts and I = 2 sin t amperes (where = 2f). The power dissipated in the instrument is -

(1)Zero

(2)10 W

(3)5 W

(4)2.5 W

(1)Zero

(2)10 W

(3)5 W

(4)2.5 W

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