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JEE Main202529 Jan 2025Morning ShiftPhysicsElectromagnetic InductionActual

A coil of area A and N turns is rotating with angular velocity ( ) in a uniform magnetic field ( B ) about an axis perpendicular to ( B ). Magnetic flux ( ) and induced ( emf ) across it, at an instant when ( B ) is parallel to the plane of coil, are :

Options

  1. A( = AB , =0 )
  2. B( =0, =0 )
  3. C( =0, = NAB )
  4. D( = AB , = NAB )

Correct answer

C. ( =0, = NAB )

Step-by-step solution

aligned & = BAN ( t ) & = - d dt = BA ~N ( t ) aligned When B is parallel to plane, t = 2 =0, = BA ~N

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