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Q.

Three wires P, Q and R of the same material and length have radii 0.1 cm, 0.2 cm and 0.3 cm respectively. Which wire has the highest value of Young's modulus of elasticity?

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a

P

b

Q

c

R

d

All have the same value

answer is D.

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Detailed Solution

Young's modulus depends upon the nature of material and not the radii of the wires.

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