Q. Two positive ions, each carrying a charge $q,$ are separated by a distance $d.$ If F is the force of repulsion between the ions, the number of electrons missing from each ion will be ($e$ being the charge on an electron)
A) $\frac{4\pi \in_{0}Fd^{2}}{q^{2}}$
B) $\frac{4\pi \in_{0}Fd^{2}}{e^{2}}$
C) $\sqrt{\frac{4\pi \in_{0}Fe^{2}}{d^{2}}}$
D) $\sqrt{\frac{4\pi \in_{0}Fd^{2}}{e^{2}}}$
Explanation
(d) [image:1_image324.emf]
$F = \frac{(ne)^{2}}{4\pi \in_{0}d^{2}} \Rightarrow n = \sqrt{\frac{4\pi \in_{0}d^{2}}{e^{2}}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.