The power dissipated in an a.c. circuit with an r.m.s, current of 5A, r.m.s voltage…

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
Correct Answer: Option A
Explanation

P = IVcos(theta)
= 5 x 10 x cos60
= 25W

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