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BITSAT2023PhysicsElectromagnetic InductionActual

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 :

Options

  1. A5 mH
  2. B12 mH
  3. C8 mH
  4. D10 mH

Correct 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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