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Question: Answered & Verified by Expert
A charge Q is moving dl distance in the magnetic field B. Find the value of work done by B.
PhysicsMagnetic Effects of CurrentJEE MainJEE Main 2021 (16 Mar Shift 2)
Options:
  • A 1
  • B Infinite
  • C Zero
  • D -1
Solution:
2875 Upvotes Verified Answer
The correct answer is: Zero

Since force on a point charge by magnetic field is always perpendicular to vF=qv×B

Work by magnetic force on the point charge is zero.

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