Answer to Question #304469 in Electricity and Magnetism for Riza de los Santos

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

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