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 as shown in the figure. Then the correct statement(s) is (are) [2015]

Question

Smart Achievers · Accepted Answer

(1, 2)

$From graph, the maximum stress that P can withstand$ $before breaking is greater than Q .$

$The strain of P is more than Q therefore P is more ductile.$

$∵$ $Y = \frac{stress}{strain}$ $So for a given strain, stress is more for Q .$

$∴$ $Y_{Q} > Y_{P}$

Solution

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 as shown in the figure. Then the correct statement(s) is (are) [2015]

1 P has more tensile strength than Q

2 P is more ductile than Q

3 P is more brittle than Q

4 The Young's modulus of P is more than that of Q

Ans.
(1, 2)

$From graph, the maximum stress that P can withstand$ $before breaking is greater than Q .$

$The strain of P is more than Q therefore P is more ductile.$

$∵$ $Y = \frac{stress}{strain}$ $So for a given strain, stress is more for Q .$

$∴$ $Y_{Q} > Y_{P}$

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