Unit and dimensional formula of surface charge density are.......

Options

A. `Cm^(2), M^(0)L^(2)A^(1)T^(1)`
B. `Cm^(-2),M^(0)L^(2)A^(1)T^(-1)`
C. `Cm^(-2), M^(0)L^(-2)A^(1)T^(1)`
D. `C^(-1)m^(2),M^(0)L^(-2)A^(1)T^(1)`

Answer

C

Explanation

Surface charge density `sigma =q/A, therefore` Unit = `Cm^(-2)` and dimensional formula:
`|sigma| = |q|/|A| = |A^(1)T^(1)|/|L^(2)| = M^(0)L^(-2)A^(1)T^(1)`