1.

Two wires A and B are stretched by the same load . If the areas of cross - section of wire A is double that of B . then the stress in B is

Answer»

EQUAL to that on A
Twice that on A
Half that on A
Pour times that on A

Solution :`("StressonA")/("StressonB")=(F/A_(A))/(F/A_(B))=A_(B)/A_(A)`
GIVEN `A_(A)=2A_(B)`
`("StressA")/("StressB")=A_(B)/(2A_(B))=1/2`
`therefore` Stress B = 2 Stress (A)


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