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A 12v battery connected to a coil of resistance

Q. A 12v battery connected to a coil of resistance 6Ω 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 :

(1) 5 mH

(2) 12 mH

(3) 8 mH

(4) 10 mH                                                                   (JEE-2023)

 

 

Aditya Bhatt Answered question 27 January 2024
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