A. 1200W
B. 600W
C. 120W
D. 30W
Correct Answer:
Option A – 1200W
Explanation
An a.c current is usually expressed as I = Io sin wt; and comparing this with the given current I = 10sin (120π)t, => Io = 10.
and power in an a.c circuit is given as:
P = I²R
= (10² x 12)
= 1200W
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