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Questions  

A particle of mass m, charge Q and kinetic energy T enters a tranverse uniform magnetic field of induction B. After 3 s, the kinetic energy or the particle will be

a
3T
b
2T
c
T
d
4T

detailed solution

Correct option is C

After passing through a magnetic field, the magnitude of its mass and speed of the particle remain the same, so its energy does not change, i.e., kinetic energy will remain T.

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