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AP EAMCET202123 Aug 2021Morning ShiftPhysicsElectromagnetic InductionActual

A conductor moving in the magnetic field B and the induced current is I . If the magnetic field is doubled the induced current will

Options

  1. Aremain the same
  2. Bbe half
  3. Cbe doubled
  4. Dbe four times

Correct answer

C. be doubled

Step-by-step solution

Given, initial magnetic field =B Initial induced current =I Final magnetic field, B^ =2 B Final current =I^ Since, emf, =B l v =I R where, B is magnetic field, l is length of conductor, v is velocity, I is current, and R is resistance. I B Hence, if B doubled current I also doubled.

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