Question

if two chargesattract each other,the explanation forthis phenomenon isthat

Answer 1

The coloumb force of attraction between the charges is negative.

$F=\frac{q_1q_2}{4\pi\epsilon_or^2}$

If the two charges are of opposite sign.

Then,

$F=-\frac{q_1q_2}{4\pi\epsilon_or^2}$

Here negative sign is indicating the attraction between the charges.

If both the charges are of same sign,

Then,

$F=+\frac{q_1q_2}{4\pi\epsilon_or^2}$

Positive sign representing the repulsion between the charges.