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AIIMS2018PhysicsElectromagnetic Induction

A circular ring of diameter 20 ~cm has a resistance of 0.01 . The charge that will flow through the ring if it is turned from a position perpendicular to a uniform magnetic field of 2.0 ~T to a position parallel to the field is about

Options

  1. A63 C
  2. B0.63 C
  3. C6.3 C
  4. D0.063 C

Correct answer

C. 6.3 C

Step-by-step solution

As aligned q & = -d R = B A ( 0^ - 90^ ) R & = B r^2(1-0) R = B r^2 R & = 2 3.14 (10⁻¹ )^2 0.01 & =6.28 C 6.3 C aligned

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