Mark the wrong statement - Vidyadip

MCQ

Mark the wrong statement

A
Sliding of molecular layer is much easier than compression or expansion
B
Reciprocal of bulk modulus of elasticity is called compressibility
✓
It is difficult to twist a long rod as compared to small rod
D
Hollow shaft is much stronger than a solid rod of same length and same mass

✓

Answer

Correct option: C.

It is difficult to twist a long rod as compared to small rod

c
(c) For twisting, Angle of shear $\varphi \propto \frac{1}{L}$

i.e. if $L$ is more then $\varphi $ will be small.

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