A proton of mass m and charge q is moving in a plane with kinetic energy E. If there exists a uniform magnetic field B, perpendicular to the plane of the motion, the proton will move in a circular path of radius

Options

A. `(2Em)/(qB)`
B. `(sqrt(2Em))/(qB)`
C. `(sqrt(Em))/(2qB)`
D. `sqrt((2Eq)/(mB))`

Answer

B