| Directions: In the following questions, a statement of Assertion [A] is followed by a statement of Reason (R). Mark the correct choice as: |
| Assertion [A]: The kinetic energy of a charged particle moving in a uniform magnetic field does not change. |
| Reason (R): In a uniform magnetic field no force acts on the charge particle. |
A) Both Assertion [A] and Reason (R) are true and Reason (R) is the correct explanation of Assertion [A]
B) Both Assertion [A] and Reason (R) are true but Reason (R) is not the correct explanation of Assertion [A]
C) Assertion [A] is true but Reason (R) is false
D) Assertion [A] is false and Reason (R) is also false
Correct Answer: C
Solution :
[c] When a charged particle is moving in a uniform magnetic field, it experiences a force in a direction perpendicular to its direction of motion. Due to which the speed of the charged particle remains unchanged and hence its kinetic energy remains same.
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