Question

Which two of the following five physical parameters have the same dimensions?
a) Energy density b) Refractive index
c) Dielectric constant d) Youngs modulus
e) Magnetic field

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

Answer 1

The correct option is A a) and d)

Energy density and Young's modulus have same
dimensions and equal to $\left[M{L}^{-1}{T}^{-2}\right]$
Dielectric constant and refractive index are
dimensionless.