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Comprehension
A uniform and transverse magnetic field exists into a regular hexagonal region as shown in figure. A charged particle \( q \) is thrown into the magnetic field with speed along line \( O A \).

The magnitude of change in velocity and magnitude of average acceleration during the time charge remains inside magnetic field.
(a) Zero, \( \frac{q v B}{m} \)
(b) \( V, \frac{3 q v B}{\pi m} \)
(c) \( \sqrt{3} V, \frac{3 q v B}{m} \)
(d) \( 3 V, \frac{\sqrt{3} q v B}{\pi m} \)
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