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Question: Answered & Verified by Expert
A particle of charge $e$ and mass $m$ moves with a velocity $v$ in a magnetic field $B$ applied perpendicular to the motion of the particle. The radius $r$ of its path in the field is
PhysicsMagnetic Effects of CurrentKCETKCET 2011
Options:
  • A $\frac{m v}{B e}$
  • B $\frac{B e}{m v}$
  • C $\frac{e v}{B m}$
  • D $\frac{B v}{e m}$
Solution:
1356 Upvotes Verified Answer
The correct answer is: $\frac{m v}{B e}$
Radius of path, $\quad r-\frac{m v}{q B}$
Here,
$q=e$
So,
$r=\frac{m v}{e B}$

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