A charged particle of charge $q$ and mass $m$, gets deflected through an angle $\theta$ upon passing through a square region of side $a$, which contains a uniform magnetic field $B$ normal to its plane. Assuming that the particle entered the square at right angles to one side, what is the speed of the particle?
A charged particle of charge $q$ and mass $m$, gets deflected through an angle $\theta$ upon passing through a square region of side $a$, which contains a uniform magnetic field $B$ normal to its plane. Assuming that the particle entered the square at right angles to one side, what is the speed of the particle?
- [KVPY 2010]
- A
$\frac{q B}{m} a \cot \theta$
- B
$\frac{q B}{m} a \tan \theta$
- C
$\frac{q B}{m} a \cot ^2 \theta$
- D
$\frac{q B}{m} \alpha \tan ^2 \theta$
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