Q.

The stress versus strain graphs for wires of two materials A and B are as shown in the figure. If YA and YB are the Young's modulii of the materials, then

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a

YB = 2YA

b

YB = 3YA

c

YA = YB

d

YA = 3YB

answer is D.

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Detailed Solution

Slope of the stress strain curve is the Young's modulus

YAYB=Tan600Tan300=3:1

YA=3YB

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