Q 1.1) What is the force between two small charged spheres having charges of 2 × 10–7C and 3 × 10–7 C placed 30 cm apart in the air?
Repulsive force of magnitude = 6 x N Charge on the first sphere, = 2 x C Charge on the second sphere, = 3 x CDistance between the spheres, r = 30 cm = 0.3 m
The electrostatic force between the spheres:Where E = Permittivity of free space and Therefore, forceHence, the force between the two small charged spheres is 6 x N. The charges are of the same nature. Hence, the force between them will be repulsive.