An electron is moving round the nucleus of a hydrogen atom in a circular orbit of radius

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

r

. The coulombic force

\vec{F}

between the two is :

\left( K = \frac{1}{4\pi\epsilon_0} \right)

(1)

\frac{Ke^2}{r^2}

(2)

-\frac{e^2}{Kr^2}

(3)

\frac{e^2}{Kr^2}

(4)

-\frac{Ke^2}{r^2}