| ASSERTION: The energy of charged particle moving in a uniform magnetic field does not change. |
| REASON: Work done by magnetic field on die charge is zero. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and 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.
E) If assertion is false but reason is true.
Correct Answer: D
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. If work done by magnetic field on the charge is zero, \[\left[ W=FS\,\cos \theta \right]\], then the energy of the charged particle does not change.
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