Question on: JAMB Physics - 1997
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 60o is
A
25W
B
50W
C
120W
D
125W
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Correct Option: A
P = IVcos(\theta)
= 5 x 10 x cos60
= 25W
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