A charge of 1μC is divided into two parts such that their charges are in the ratio of 2:3. These two charges are kept at a distance 1m apart in vaccum. Then, the electric force between them (in newton) is :
Let the charges be
2q and 3q
2q+3q=1μC
5q=1μC
q=15μC
∴charges are 25μC and 35μC
Force =Kq1q2r2
=9×109×1225×10−6×35×10−6
=9×6×10−325
=2.16×10−3
=0.00216