A) Linear momentum changes
B) kinetic energy remains constant
C) Both [a] and [b]
D) Both linear momentum and kinetic energy varies
Correct Answer: B
Solution :
| Option [b] is correct. |
| Explanation: When a charged particle perpendicularly enters a magnetic field to the direction, the path of the motion is circular. |
| In circular motion, the direction of velocity changes at every point (the magnitude remains constant). Therefore, the linear momentum changes at every point. But kinetic energy remains constant since the magnitude of velocity does not change. |
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