Question 1
What is the force between two small charged spheres having charges of 2 x 10-7 C and 3 x 10-7 C placed 30 cm apart in air?
Repulsive force of magnitude 6 × 10 - 3 N
Charge on the first sphere, q1 = 2 × 10 - 7 C
Charge on the second sphere, q2 = 3 × 10 - 7 C
Distance between the spheres, r = 30 cm = 0.3 m
Electrostatic force between the spheres is given by the relation,
Where, ∈0 = Permittivity of free space
Hence, force between the two small charged spheres is 6 × 10 - 3 N. The charges are of same nature. Hence, force between them will be repulsive.
