Q. Young’s modulus of perfectly rigid body material is
A) Infinite
B) Zero
C) $10 \times 10^{10}\ {Nm}^{- 2}$
D) $1 \times 10^{10}\ {Nm}^{- 2}$
Explanation
(a) Young’s modulus of a material is given by
$Y = \frac{F \times L}{A \times l}$
For a perfectly rigid body,
$l = 0$
$\therefore\ Y = \infty$ (infinite)
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.