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MHT CET202613 April 2026Evening ShiftPhysicsMotion in One DimensionActual

Spherical insulating ball and a spherical metallic ball of same size and mass are dropped from the same height. Choose the correct statement out of the following Assume negligible air friction

Options

  1. ATime taken by them to reach the earth's surface will be independent of the properties of their materials.
  2. BInsulating ball will reach the earth's surface earlier than the metal ball.
  3. CBoth will reach the earth's surface simultaneously.
  4. DMetal ball will reach the earth's surface earlier than the insulating ball.

Correct answer

B. Insulating ball will reach the earth's surface earlier than the metal ball.

Step-by-step solution

As the metallic ball falls through the Earth's magnetic field, it cuts the magnetic field lines, which induces an electromotive force (EMF) in it. Since the ball is a conductor, this induced EMF generates eddy currents within the metallic ball. According to Lenz's law, these eddy currents oppose the motion that causes them, creating an upward magnetic retarding force. As a result, the net downward acceleration of the metallic ball becomes less than the acceleration due to gravity g . The insulating ball is a non-co

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