Which two of the following five physical parameters have the same dimensions?`
Energy density
Refractive index
Dielectric constant
Young’s modulus
Magnetic field

Options

A. (a) and (b)
B. (a) and (e)
C. (b) and (d)
D. (c) and (e)

Answer

A

Explanation

Energy density and Young's modulus have same dimensions and equal to`[ML^(-1)T^(-2)]`
Dielectric constant and refractive index are dimensionless.