A proton moves in a circle of radius in a uniform magnetic field of

PHYSICS · Single correct · CBSE · Physics · Moving Charges and Magnetism · Moving Charges and Magnetism

Problem

A proton moves in a circle of radius

2.0\,\text{cm}

in a uniform magnetic field of

0.20\,\text{T}

, the velocity being perpendicular to the field. Calculate its kinetic energy. (Take

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

m_p=1.67\times10^{-27}\,\text{kg}

.) (a)

7.7\times10^{3}\,\text{eV}

(b)

7.7\times10^{2}\,\text{eV}

(c)

1.9\times10^{2}\,\text{eV}

(d)

1.5\times10^{3}\,\text{eV}