Elastic Behaviour, Stress & Strain
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): The stretching of a spring is determined by the shear modulus of the material of the spring.
Reason (R): A coil spring of copper has more tensile strength than a steel spring of same dimensions.
In the light of the above statements, choose the most appropriate answer from the options given below:
Show answer and solution
Answer: (c)
- (A) When a coil spring is stretched, the wire of the coil gets twisted, so its stretching depends on the shear modulus. True.
- (R) Steel has a much higher tensile strength than copper, so a copper spring is not stronger. False.
- So the answer is (c) (A) is true but (R) is false.