A proton of mass m and charge q is movin...

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 motion. The proton will move in a circular path of radius

`(2 Em)/(qB)`

`(sqrt(2 Em))/(qB)`

`(sqrt(Em))/(2qB)`

`sqrt((2Eq)/(mB)`

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