Question

Two wires of same diameter of the same material having the length `l` and `2l` If the force `F` is applied on each, the ratio of the work done in two wires will be
A. `1:2`
B. `1:4`
C. `2:1`
D. `1:1`

Answer 1

Correct Answer - A
`W=(1)/(2)Fl` `because` `Wpropl`
`(W_1)/(W_2)=(l_1)/(l_2)=(l)/(2l)=(1)/(2)`