Published by:
CGP EDU Academic Team
Published on: September 13, 2026
A 12 V battery connected to a coil of resistance 6 
through a switch, drives a constant current in the circuit. The switch is opened in 1 ms. The emf induced across the coil is 20 V. The inductance of the coil is:
Text Solution
Verified by ExpertsThe correct answer is:
A
The current (i) through the circuit is given by
= 2A
The formula to calculate the induced emf in the coil can be written as
….(i)
Substitute the values of the known parameters into equation (i) and solve to calculate the inductance of the coil.
= 10 mH
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