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MHT CET Medical202626 April 2026Morning ShiftPhysicsElectromagnetic InductionActual

The value of mutual inductance of two coils is 6 mH. The current in one of the coil changes from 7 A to 2 A in 0.2 second, so that e.m.f. is induced in the other coil. If the resistance of the coil is 6 , the value of induced charge passing through the coil is

Options

  1. A3 mC
  2. B5 mC
  3. C7 mC
  4. D9 mC

Correct answer

B. 5 mC

Step-by-step solution

The induced emf in the secondary coil is given by e = -M I t . The induced current is i = e R = - M R I t . The induced charge passing through the coil is q = i t = - M R I . Taking the magnitude of the induced charge, q = M R | I| . Substituting the given values, M = 6 10⁻³ H, R = 6 , and | I| = |2 - 7| = 5 A. q = 6 10⁻³ 6 5 = 5 10⁻³ C = 5 mC. Answer: 5 mC

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