Q. Which of the following quantities has not been expressed in proper unit
A) Torque : Newton metre
B) Stress : Newton $metre^{- 2}$
C) Modulus of elasticity : Newton $metre^{- 2}$
D) Surface tension : Newton $metre^{- 2}$
Explanation
Surface tension is defined as the force per unit length and hence its unit is newton $metre^{- 1}$ or $Nm^{- 1}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.