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(A): A deforming force in one direction ...

(A): A deforming force in one direction can produce strain in other directions.
(R) : The proportionality between stress and strain defines Hooke's law of elasticity.

A

Both (A) and (R) are true and (R) is the correct explanation of (A)

B

Both (A) and (R) are true and (R) is not the correct explanation of (A)

C

(A) is true but (R) is false

D

Both (A) and (R) are false

Text Solution

Verified by Experts

The correct Answer is:
B
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According to Hooke's law of elasticity the ratio of stress to strain

AAKASH SERIES-MECHANICAL PROPERTIES OF SOLIDS-EXERCISE IB (ASSERTION (A) AND REASON ( R) TYPE QUESTIONS (STRESS; STRAIN ; ELASTICITY; YOUNGS MODULUS))
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  2. (A) : Young's modulus for a perfectly plastic body is zero. (R): ...

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  3. (A): Force constant K = (YA)/(l) where Y is Young's modulus. A is Area...

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  4. (A): A wire may be stiffer than another wire B. But B may stronger tha...

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  5. (A) : Wet clay does not regain its shape (R) : Young's modulus for...

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  6. (A): Two rods of same material but of different lengths are fixed betw...

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  7. (A): Metals have larger values of Young's modulus than its alloys (...

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  8. (A) : With increase in temperature, elastic property of a substance de...

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  9. (A): Elastic restoring forces may be conservative. (R): The value ...

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  10. (A): Spring balances show wrong readings after they has been used for ...

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  11. (A): A load bearing bar is usually constructed in 'I' shape. (R):...

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  12. (A): Solids are least compressible. (R) : There is tight coupling b...

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  13. (A) : Rubber is an elastomer. (R) : Stress-strain curve of rubber ...

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  14. (A) : Steel is preferred than aluminium in heavy-duty machines (R...

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  15. (A): If radius of a sphere attached to a wire is doubled, elongation o...

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  16. (A) : Tissue of aorta is an elastomer. (R) : Strain-stress curve i...

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  17. (A): Elastomers does not obey Hooke's law. (R): For elastomers, s...

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  18. (A): Young's modulus and shear modulus are relevant only for solids. ...

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  19. (A): A deforming force in one direction can produce strain in other di...

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  20. (A) : Stress is a not vector quantity. (R): Stress can not be assig...

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