KCET 2022 | Elasticity Question 4 | Physics

A metallic rod breaks when strain produced is $$0.2 \%$$. The Young's modulus of the material of the $$\operatorname{rod} 7 \times 10^9 \mathrm{~N} / \mathrm{m}^2$$. The area of crosssection to support a load of $$10^4 \mathrm{~N}$$ is

$$7.1 \times 10^{-6} \mathrm{~m}^2$$

$$7.1 \times 10^{-4} \mathrm{~m}^2$$

$$7.1 \times 10^{-2} \mathrm{~m}^2$$

$$7.1 \times 10^{-8} \mathrm{~m}^2$$

KCET 2020

MCQ (Single Correct Answer)

-0

Young's modulus of a perfect rigid body is

zero

unity

infinity

Between (a) and (b)

KCET 2019

MCQ (Single Correct Answer)

-0

A wire is stretched such that its volume remains constant. The poission's ratio of the material of the wire is

0.50

$$-$$0.50

0.25

$$-$$0.25

KCET 2018

MCQ (Single Correct Answer)

-0

Two wires $A$ and $B$ are stretched by the same load. If the area of cross-section of wire $A$ is double that of $B$, then the stress on $B$ is

equal to that on $A$

twice that on $A$

half that on $A$

four times that on $A$

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