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Question: Answered & Verified by Expert
A magnetic needle suspended horizontally by an unspun silk fibre oscillates in the horizontal plane because of the restoring force originating mainly from
PhysicsMagnetic Properties of MatterNEET
Options:
  • A the torsion of the silk fibre
  • B the horizontal component of earth's magnetic field
  • C the force of gravity
  • D all the above factors
Solution:
2903 Upvotes Verified Answer
The correct answer is: the horizontal component of earth's magnetic field
Earth behaves as a magnet which will interact with the magnetic needle and makes it oscillate.

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