Question

Two wires of the same radius and material and having lengths in the ratio 8.9 : 7.6 are stretched by the same force. The strains produced in the two cases will be in the ratio –

• A. 1 : 1
• B. 1 : 7.6
• C. 8.9 : 1
• D. 1: 3.2

Answer 1

Answer: (A)

1 : 1

Answer 2

Y = $\frac{stress}{strain}$ ; Strain = $\frac{stress}{Y} = \frac{F/\pi r^{2}}{Y}$.

Strain does not depend on the length