STANDARD Physics Elasticity MCQ Question
A wire of length L and radius r is clamped at one end. On stretching the other end of the wire with a force F, the increase in its length is L. If another wire of same material but of length 2L and radius 2r is stretched with a force 2F, the increase in its length will be
L/4
L/2
L
2L
Correct Answer
Detailed Explanation
Using the formula for elongation ΔL = FL/AY, where A is the cross-sectional area and Y is Young's modulus, the increase in length for the second wire is calculated as L/2.
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