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21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

Sliding of molecular layer is much easier than compression or expansion

Reciprocal of bulk modulus of elasticity is called compressibility

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

Hollow shaft is much stronger than a solid rod of same length and same mass

answer is C.

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Detailed Solution

For twisting, Angle of shear φ ∞ 1Li.e., if L is more than φ will be small.

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