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Two wires A and B of same material have ...

Two wires A and B of same material have radii in the ratio 2 : 1 and lengths in the ratio 4 : 1. The ratio of the normal forces required to produce the same change in the lengths of these two wires is

A

(A) 1:1

B

(B) 2:1

C

(C) 1:4

D

(D) 1:2

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The correct Answer is:
A
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