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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a
YB = 2YA
b
YA = YB
c
YB = 3YA
d
YA = 3YB
answer is D.
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Detailed Solution
StressStrain = Y = slope of graph∴ YAYB = tan 60tan 30 = 3 ∴ YA = 3YB