JEE Main 2022 · 25 Jul · Shift 1 · Physics Q53

← JEE Main 2022 · 25 Jul · Shift 1

PhysicsInteger+4 / -1Question 53 of 90

A wire of length L and radius r is clamped rigidly at one end. When the other end of the wire is pulled by a force F, its length increases by 5 cm. Another wire of the same material of length 4L and radius 4r is pulled by a force 4F under same conditions. The increase in length of this wire is ______ cm.

Your answer

Answer and worked solution

Official answer: 5

Extension $\propto\frac{FL}{r^2}$ : $\frac{4\times4}{16}=1$ , so 5 cm.

Answer: 5

Topics:Hooke's law and elastic moduli

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JEE Main 2022 · 25 Jul · Shift 1, Physics question 53