Question
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 :
BITSAT
Physics
Electromagnetic Induction
2023
BITSAT 2023 (Memory Based Paper 2)
BITSAT Physics Question (2023) — Solution
Options
- A. 5 mH
- B. 12 mH
- C. 8 mH
- D. 10 mH
Answer
D. 10 mH
Step-by-step solution
Induced emf, =- L dI dt 20=- L (0-2) 10^ -3 Hence, inductance of the coil. L =10 mH
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