Question

Three charged spheres are at the positions shown in the figure.

(a) Find the net electrostatic force at sphere B.

(b) Find the net electric field at (4,-3)

Answer 1

Answer

a) if there are two charges in any system then electrostatics force is given by

$F=\frac{kQQ'}{r^2}$

b) for this point (4, -3) so electrostatics force is given by in vector form

$F=\frac{kQQ'\hat{r}}{|r-r'|^3}$