Physics

Problem

A proton (

m_p = 1.67 \times 10^{-27}\,\text{kg}

e = 1.60 \times 10^{-19}\,\text{C}

) moves in a uniform magnetic field of magnitude

1.8\,\text{T}

, its velocity being perpendicular to the field. Calculate its frequency of revolution in \text{MHz}.