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KCET2017PhysicsWaves and Sound

A bar magnet is allowed to fall verticallythrough a copper coil placed in a horizontalplane. The magnet falls with a net acceleration

Options

  1. A(=g )
  2. B(> g )
  3. C( < g )
  4. DZero

Correct answer

C. ( < g )

Step-by-step solution

According to Lenz's law, as the magnet falls it induces an emf in the coil which opposes the motion of the bar magnet. Therefore, the net acceleration is less than ( g ).

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