An a.c of 1A at a frequency of 800 cycles per second flows through a coil, the inductance of which is 2.5mH and the resistance of which is 5Ω. What is the power absorbed in the Coil?
-
A.
5W -
B.
6W -
C.
7W -
D.
8W
Correct Answer: Option A
Explanation
I = 1A, F = 800 cycles/s = 800Hz
R = 5Ω, L = 2.5mH
P = I(^2)R = I(^2) × 5 = 5W
There is an explanation video available below.