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A metallic circular ring is suspended by a string and is kept in a vertical plane. When a magnet is approached towards the ring, then it will:

Correct answer: C. get displaced towards the magnet

  • A. remain stationary
  • B. get displaced away from the magnet
  • C. get displaced towards the magnet
  • D. nothing can be said

Explanation

C is correct. When a magnet is approached towards a metallic circular ring, an electromotive force (EMF) is induced in the ring due to the changing magnetic flux. This induced EMF creates a current, and according to Lenz's law, the direction of the induced current opposes the change in magnetic flux. As a result, the ring experiences a magnetic force that causes it to move towards the approaching magnet.

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About Electromagnetism

Magnetic flux density and magnetic flux describe the strength of a magnetic field and the field passing through a surface. A charged particle moving through a magnetic field experiences a force perpendicular to its velocity and may follow circular or helical motion, depending on the angle between velocity and field.

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