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

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YB = 2YA

YA = YB

YB = 3YA

YA = 3YB

answer is D.

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Detailed Solution

StressStrain = Y = slope of graph∴ YAYB = tan 60tan 30 = 3 ∴ YA = 3YB

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