Two wires A and B have the same cross-section and are made of the same material, but the length of wire A is twice that of B. Then for a give load.
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a
The extension of A will be twice that of B.
b
The strain in A will be twice that of B.
c
The strains in A and B will be equal.
d
both (1) and (3) are correct.
answer is D.
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Detailed Solution
Stress developed in the rods will be the same.Extension δ=F.lAY⇒δ∝l. So (1) is correct.Also, strain = stressYoung's modulus. So, (3) is also correct.Hence option-(4) is correct.