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Moving Charges And Magnetism

Question
CBSEENPH12040049
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A particle mass m, charge Q and kinetic energy T enter a transverse uniform magnetic field of induction.bold B with rightwards arrow on top After 3 s the kinetic energy of the particle will be

  • 3T

  • 2T

  • T

  • 4T

Solution

C.

T

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

Some More Questions From Moving Charges And Magnetism Chapter

Answer the following questions:
A charged particle enters an environment of a strong and non-uniform magnetic field varying from point to point both in magnitude and direction, and comes out of it following a complicated trajectory. Would its final speed equal the initial speed if it suffered no collisions with the environment?

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