Question

The S.I unit of electric permittivity is

Options

• Nm²C^–2

• Am^–1

• NC^–1

• C²N^–1m^–2

Answer 1

C²N^–1m^–2 

Explanation:

The S.I unit of electric permittivity is [C²N^–1m^–2]. Coulomb's law states that the force between two charges is

F = `(q_1q_2)/(4piE_0r^2)  = ∑_0 = (q_1q_2)/(4piFr^2)`

or `∑_0 = (C.C)/(N*m^2)`