Read the following two statements below carefully and state, with reas

1.	Read the following two statements below carefully and state, with reason if it is true or false:(a) The Young's modulus of rubber is greater than that of steel;(b) The stretching of a coil is determined by its shear modulus.
Answer» (a) It is false:- The modulus of elasticity of steel is greater than that of rubber. It is because, for producing same strain in steel and rubber, more stress is required in case of steel. (b) It is true:- The reason is that when a coil is stretched, there is neither a change in the length of the coil (length of the wire forming the coil spring) nor a change in its volume. Since, the change takes place in the shape of the coil spring, its stretching is determined by its shear modulus.

Read the following two statements below carefully and state, with reason if it is true or false:(a) The Young's modulus of rubber is greater than that of steel;(b) The stretching of a coil is determined by its shear modulus.

Answer»

(a) It is false:- The modulus of elasticity of steel is greater than that of rubber. It is because, for producing same strain in steel and rubber, more stress is required in case of steel.

(b) It is true:- The reason is that when a coil is stretched, there is neither a change in the length of the coil (length of the wire forming the coil spring) nor a change in its volume. Since, the change takes place in the shape of the coil spring, its stretching is determined by its shear modulus.

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