Electric Charges and Fields – Solutions

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?

Solution:

Electrostatic force between the spheres is given by the relation,

F = q₁ x q ₂/4πε_or² 

Where q₁ = charge on the first sphere

q ₂ = charge on the second sphere

r = distance between the sphere

ε₀ = Permittivity of free space

According to the question:-