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MHT CET202121 Sep 2021Morning ShiftPhysicsElectromagnetic InductionActual

A wire of length ' L ' having resistance ' R ' falls from a height ' ' in earth's horizontal magnetic field ' B '. The induced emf through the wire is ( g = acceleration due to gravity)

Options

  1. ABL 2 ~g
  2. BBL 2 ~g 2
  3. CBL 2 ~g R
  4. DBL 2 ~g

Correct answer

A. BL 2 ~g

Step-by-step solution

If the wire falls through a height , the velocity acquired by it is v = 2 ~g The emf induced in the wire E = BLv = BL 2 ~g

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