Question

Two metallic spheres each of mass $M$ and radius $R$ charged separately to $Q_1$ and $Q_2,$ are at a distance ${}^{\prime }{d}^{\prime }$ between $C$ their centers $\left(d>2R\right).$ The force between them will be:

• A. $\frac{1}{4\pi {\epsilon }_0}\frac{Q_1{Q}_2}{d^2}$
• B. $\frac{1}{4\pi {\epsilon }_0}\frac{Q_1{Q}_2}{d}$
• C. $<\frac{1}{4\pi {\epsilon }_0}\frac{Q_1{Q}_2}{d^2}$
• D. Zero

Answer 1

The correct option is A $\frac{1}{4\pi {\epsilon }_0}\frac{Q_1{Q}_2}{d^2}$

Two metallic spheres each of mass $=M$

radius $=R$

$Q_1$ and $Q_2$ distance $=d$ between $e$ their centre $(d>2R)$

$F=\frac{1}{4\pi {ϵ}_0}\frac{Q_1{Q}_2}{d^2}$

(Using coulombs' law and the force is in depend of mass and radius in coulomb law).