Question:
A particle of mass $m$ and charge $q$ is projected into a region having a perpendicular magnetic field $B$. Find the angle of deviation of the particle as it comes out of the magnetic field if the width d of the region is very slightly smaller than
(a) $\frac{m v}{q B}$
(b) $\frac{m v}{2 q B}$
(c) $\frac{2 m v}{q B}$
Solution:
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