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Q.

In plotting stress versus strain curves for two materials P and Q, a student by mistake puts strain on the y-axis and stress on the x-axis shown in the figure. Then the correct statement(s) is (are)

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a

P is more ductile than Q

b

The young’s modulus of P is more than that of Q

c

P has more tensile strength than Q

d

P is more brittle than Q

answer is A, B.

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Detailed Solution

$S l o p e = \frac{strain}{stress} = \frac{1}{Y}$

$\begin{array}{l} \Rightarrow slope \propto \frac{1}{Y} \\ \Rightarrow m_{P} > m_{Q} \\ \Rightarrow Y_{P} < Y_{Q} \end{array}$

$Also, for a particular value of stress, P can sustain more strain.$

$A, B a r e c o r r e c t$

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In plotting stress versus strain curves for two materials P and Q, a student by mistake puts strain on the y-axis and stress on the x-axis shown in the figure. Then the correct statement(s) is (are)