JAMB - Physics (1997 - No. 36) | ExamPlay

JAMB - Physics (1997 - No. 36)

The power dissipated in an a.c. circuit with an r.m.s, current of 5A, r.m.s voltage of 10V and a phase angle of 60^o is

25W

50W

120W

125W

Обяснение

P = IVcos\(\theta\)

= 5 x 10 x cos60

= 25W

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