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A particle of mass m, charge q and kinetic energy T enters in a transverse uniform magnetic field of induction B. After the 3 s, the kinetic energy of

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A particle of mass m, charge q and kinetic energy T enters in a transverse uniform magnetic field of induction B. After the 3 s, the kinetic energy of the particle will be
A. 3T
B. 2T
C. T
D. 4T
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Correct Answer - C
After passing through a magnetic field the magnitude of its mass and velocity of the particle remain same so its energy does not chagne i.e kinetic energy will remain T
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