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
Verified Correct Answer: A.
Physical Principles & Numerical Solution
P = IVcos\(\theta\)
= 5 x 10 x cos60
= 25W
Source: Myschool Past Questions Archive (Record #27734)