Physics

Problem

An electron (mass

9.1\times10^{-31}\,\text{kg}

, charge

-e

where

e=1.6\times10^{-19}\,\text{C}

) is projected with speed

2.0\times10^{6}\,\text{m\,s}^{-1}

at an angle of

30^{\circ}

to a uniform magnetic field of

0.20\,\text{T}

. Calculate the radius of the circular component of its trajectory.