Question

a force F doubles the length of wire of crass section a. tha young modulus of wire is

Answer 1

As youngsters modulus is given as,
Y =F/a. L/Delta L

If F becomes 2F then,
From above we can conclude that
Y'=2Y

That is youngs modulus becomes 2 times to its original value.

Hope you get your answer.

Answer 2

Answer:

The answer is F/a.

Explanation:

See the attachment.

Hope it helps...