Question

Please explain me this question
Please explain me the concept​

Answer 1

(b) 0.5mm

Explanation:

I will explain you only concept but still you solve by own.

• Young modulus elasticity of strain and strain Y(E)=F/a/ ∆l/l
• E= F/a×l/∆l
• E=Fl/a∆l
• since ∆l is directly proportional to the 1/r^2
• Now, you solve this.... somthing 1/2 aayega again u will solve 0.5mm is the ans

I hope it's helpfull for u