A wire of length L and radius r is clamped rigidly at one end. When...

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 l. Another wire of the same material of length 2L and radius 2r, is pulled by a force 2f. Find the increase in length of this wire.

Options

Al/2
Bl
C2l
D4l

Correct answer

B. l

Step-by-step solution

Correct Option is : (B)
l

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