A charged particle of mass \( m \) and charge \( q \) travels in a circular path of radius \( r ...

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A charged particle of mass \( m \) and charge \( q \) travels in a circular path of radius \( r \) that is perpendicular to a magnetic field \( B \). The time taken by the particle to complete one revolution is
[AIEEE 2005; Similar KCET 2007]
(a) \( \frac{2 \pi q B}{m} \)
(b) \( \frac{2 \pi m}{q B} \)
(c) \( \frac{2 \pi m q}{B} \)
(d) \( \frac{2 \pi q^{2} B}{m} \)
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