Read the following two statements below carefully and state, with reasons, if it is true or false,
(a) The Young's modulus of rubber is greater than that of steel,

Explanation

False :
? Young.s modulus`= ("Stress")/("Strain")= ("Stress")/(Delta L//L)`
For given stress there is more strain in rubber than steel and modulus of elasticity is inversely proporational to strain. Hence, Young.s modulus of steel is more than that or rubber:
(b) Stretching of a coil is determined by its shear modulus. When equal and oppositte forces are applied at opposite ends of a coil, the distance as well as shape of helicals of the coil change and it involves shear modulus. Hence there is relation between stretching of a coil shear modulus. So, given statement is correct.