Question

a wire of length l and radius r are subjected by a force f keeping the other things same if radius is doubled then how its young modulus will change?​

Answer 1

Here is your answer.

1. The formula for excess pressure in bubble trapped in liquid = 2Sr

2.We know from Hook's law FA=Y∆ll⇒Y=FA×l∆l

Where F is applied force

Y is young' modulus, l is length and A is area of cross-section and Δl is the change in length.

According to question ,

Y'=FA'×l'∆lY'=Fπ(r2)2×l2∆lY'=4Fπr2×l2∆lY'=2FA×l∆l= 2Y

Thus young's modulus becomes double of initial value.

I hope my answer is help you.

B brainly.