Q. Which of the following physical quantities has neither dimensions nor unit?
A) Angle
B) Luminous intensity
C) Coefficient of friction
D) Current
Explanation
Coefficient o friction$= \frac{Applied\ force}{\begin{array}{r} Normal\ reactiom \\ \ \end{array}}$ $= \frac{\lbrack MLT^{- 2}\rbrack}{\lbrack MLT^{- 2}\rbrack} =$no dimensions Unit$= \frac{N}{N} =$no unit
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.