Question

15. 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.
(c)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 1

(c) it is difficult to twist a long rod as compared to a small rod