Problem

A charged particle moving along positive

x

-direction with a velocity

v

enters a region where there is a uniform magnetic field

\mathbf{B} = -B\hat{\mathbf{k}}

, from

x = 0

x = d

. The particle gets deflected at an angle

\theta

from its initial path. The specific charge of the particle is (a)

\frac{Bd}{v \cos \theta}

(b)

\frac{v \tan \theta}{Bd}

(c)

\frac{B \sin \theta}{vd}

(d)

\frac{v \sin \theta}{Bd}