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
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
$\frac{{2\pi \,{q^2}B}}{m}$
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$C.$ The electron will continue to move along the axis of the solenoid.
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- [JEE MAIN 2023]
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