Question on: JAMB Physics - 2019
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
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Correct Option: A
I = 1A,
F = 800 cycles/s = 800Hz
R = 5Ω, L = 2.5mH
P = I\(^2\)R = I\(^2\) × 5 = 5W
P = 5W
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