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Question: Answered & Verified by Expert
A loop of flexible wire of irregular shape carrying current is placed in an external magnetic field. Identify the effect of the field on the wire.
PhysicsMagnetic Effects of CurrentJEE MainJEE Main 2021 (18 Mar Shift 1)
Options:
  • A Loop assumes circular shape with its plane normal to the field.
  • B Loop assumes circular shape with its plane parallel to the field.
  • C Wire gets stretched to become straight.
  • D Shape of the loop remains unchanged.
Solution:
2343 Upvotes Verified Answer
The correct answer is: Loop assumes circular shape with its plane normal to the field.
Every part (dl ) of the wire is pulled by the force i(dl)B acting perpendicular to the current & magnetic field giving it the shape of a circle.

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