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MHT CET20225 Aug 2022Evening ShiftPhysicsElectromagnetic InductionActual

The charge which will flow through a galvanometer of resistance 200 connected to a 400 circular coil of 1000 turns wound on a wooden stick 20 ~mm in diameter, if a magnetic field B =0.012 ~T parallel to the axis of the stick decreased suddenly to zero is nearly

Options

  1. A63 C
  2. B630 C
  3. C6.3 C
  4. D0.63 C

Correct answer

C. 6.3 C

Step-by-step solution

Charge flowing through a circuit due to flux change is written as, q = R = NA ( B ₂- B ₁ ) R = N r ^2 ( ~B ₂- B ₁ ) R On plugging the given values, q= 1000 10⁻⁴ (0.012-0) (200+400) On solving, q= 1000 10⁻⁴ (0.012-0) (200+400)

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