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Question: Answered & Verified by Expert
A charge ' $\mathrm{q}_{\circ}{ }^{\prime}$ moving with velocity ' $\overrightarrow{\mathrm{v}}$ 'in a magnetic field of induction $\overrightarrow{\mathrm{B}}$,
experiences force $\overrightarrow{\mathrm{F}}$ '. The angle between $\overrightarrow{\mathrm{v}}$ and $\overrightarrow{\mathrm{B}}$ is $\theta$.
The speed of ' $\mathrm{q}_{\circ}$ ' after one second will be
PhysicsMagnetic Effects of CurrentMHT CETMHT CET 2020 (12 Oct Shift 1)
Options:
  • A $\mathrm{v} / \mathrm{B}$
  • B $\mathrm{v}$
  • C $\mathrm{v} \times \mathrm{B}$
  • D $\mathrm{B} / \mathrm{v}$
Solution:
1435 Upvotes Verified Answer
The correct answer is: $\mathrm{v}$
The magnetic force does not change the magnitude of the velocity as it acts right angles to the velocity.

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