Question

A charge + exerts a force of magnitude -0.2 N on another change -2q. If they are separated by 25.0 cm, determine the value of q.​

Answer 1

Answer:

I hope it's help to you..

By Coulomb's law,

$f \: = \: \frac{kq1 \: q2}{r {}^{2} }$

If the distance between them is doubled and the charge of one of the particles is doubled, the force becomes,

$f \: = \: \frac{kq1(2p2)}{(2r) {}^{2} } \: = \frac{f}{2}$