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Question: Answered & Verified by Expert
Assertion : Magnetic field can not change kinetic energy of a moving charge.
Reason : Magnetic field can not change velocity vector.
PhysicsMagnetic Effects of CurrentAIIMSAIIMS 2018 (26 May)
Options:
  • A If both assertion and reason are true and reason is the correct explanation of assertion.
  • B If both assertion and reason are true but reason is not the correct explanation of assertion.
  • C If assertion is true but reason is false.
  • D If both assertion and reason are false.
Solution:
2209 Upvotes Verified Answer
The correct answer is: If assertion is true but reason is false.
Magnetic force on moving charge is always perpendicular to its velocity.
$\vec{F}=q(v \times \vec{B})$
Also, work done by magnetic force on a moving charge is zero.

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