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MHT CET202416 May 2024Evening ShiftPhysicsElectromagnetic InductionActual

A circular coil of resistance ' R ', area ' A ', number of turns ' N ' is rotated about its vertical diameter with angular speed ' ' in a uniform magnetic field of magnitude ' B '. The average power dissipated in a complete cycle is

Options

  1. AN ^2 ~A ^2 ~B ^2 ^2 2 R
  2. BB N A R
  3. CB N A 2 R
  4. DN ^2 ~A ^2 ~B ^2 ^2 R

Correct answer

A. N ^2 ~A ^2 ~B ^2 ^2 2 R

Step-by-step solution

For a circular coil, aligned & e₀=N A B & i₀= N A B R aligned aligned & Average power dissipated per cycle = 1 2 e ₀ i ₀ & = 1 2 ( NAB ) ( NAB ) R & = N ^2 ~A ^2 ~B ^2 ^2 2 R aligned

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