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MHT CET202123 Sep 2021Morning ShiftPhysicsElectromagnetic InductionActual

If the current of ' I ' gives rise to a magnetic flux ' ' through a coil having ' N ' turns, then magnetic energy stored in the medium surrounding the coil is

Options

  1. AN I 4
  2. BN I 2
  3. CNI 2
  4. DN 2 I

Correct answer

B. N I 2

Step-by-step solution

Inductance of the coil, L = I Energy stored due to single turn, U = 1 2 LI ^2= 1 2 ( I ) I ^2= I 2 Energy stored due to N turns, U ^ = N I 2

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