$A$ particle having charge of $1 \, C$,mass $1 \, kg$ and speed $1 \, m/s$ enters a uniform magnetic field,having magnetic induction of $1 \, T$,at an angle $\theta = 30^\circ$ between the velocity vector and the magnetic induction. The pitch of its helical path is (in meters):
- A$\frac{\sqrt{3} \pi}{2}$
- B$\sqrt{3} \pi$
- C$\frac{\pi}{2}$
- D$\pi$
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