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KCET2007PhysicsElectromagnetic Induction

Current in a coil changes from 4 ~A to zero in 0.1 ~s and the emf induced is 100 ~V . The self inductance of the coil is

Options

  1. A0.25 H
  2. B0.4 H
  3. C2.5 H
  4. D4 H

Correct answer

C. 2.5 H

Step-by-step solution

Induced emf, e= -L d I d t aligned & 100 &= -L[0-4] 0.1 & L &= 100 0.1 4 &=2.5 H aligned

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