Question

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 same material of length '2L' and radius '2r' is pulled by a force '2f'. Then the increase in its length will be

• A. l
• B. 2l
• C. 4l
• D. $\frac{l}{2}$

Answer 1

Answer: (A)

l

Answer 2

The correct option is(A): l