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AIIMS 2008
Exam
AIIMS
Year
2008
Subject
Physics
Chapter
Magnetic Effects of Current

AIIMS 2008 · Physics · Magnetic Effects of Current

Assertion : The energy of charged particle moving in a uniform...

Assertion : The energy of charged particle moving in a uniform magnetic field does not change. Reason : Work done by magnetic field on the charge is zero.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion
  3. CIf assertion is true but reason is false
  4. DIf both assertion and reason are false.

Correct answer

D. If both assertion and reason are false.

Step-by-step solution

The force on a charged particle moving in a uniform magnetic field always acts in direction perpendicular to the direction of motion of the charge. As work done by magnetic field on the charge is zero. [W=FScos⁡θ][W=F S \cos \theta], so the energy of the charged particle does not change.
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