Electrons moving with different speeds enter a uniform magnetic f… - Vidyadip

MCQ

Electrons moving with different speeds enter a uniform magnetic field in a direction perpendicular to the field. They will move along circular paths.

A
of same radius
✓
with larger radii for the faster electrons
C
with smaller radii for the faster electrons
D
either $(b)$ or $(c)$ depending on the magnitude of the magnetic field

✓

Answer

Correct option: B.

with larger radii for the faster electrons

b
$r=\frac{m v}{q B} \Rightarrow r \propto v$

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