Question

A positive and a negative charge are initially 4 cm apart. When they are moved closer together so that they are now only 1 cm apart, the force between them is

(a) 4 times smaller than before
(b) 4 times larger than before
(c) 8 times larger than before
(d) 16 times lager than before

Answer 1

`\boxed{\tt(b) \: 4 \: times \: larger \: than \: before}`