question_answer

A charged particle of mass m and charge q travels on 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]

A)            \[\frac{2\pi qB}{m}\]        

B)            \[\frac{2\pi \,m}{q\,B}\]

C)            \[\frac{2\pi \,m\,q}{B}\] 

D)            \[\frac{2\pi \,{{q}^{2}}B}{m}\]