Question

Which of the following physical quantities has neither dimensions nor unit ?

• A. Angle
• B. Luminous intensity
• C. Coefficient of friction
• D. Current

Answer 1

Answer: (C)

Coefficient of friction

Answer 2

Coeff. of friction = $\frac{Appliedforce}{Normalreaction}$

= $\frac{\lbrack MLT^{–2}\rbrack}{\lbrack MLT^{–2}\rbrack}$ = No dimensions