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What are dimensions of Young's modulus o...

What are dimensions of Young's modulus of elasticity?

A

`[L^(-1)MT^(2)]`

B

`[L^(-1)MT^(-2)]`

C

`[LMT^(-2)]`

D

`[L^(-1)M^(-1)T^(2)]`

Text Solution

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The correct Answer is:
B
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Assertion Modulus of elasticity does not depend upon the dimensions of material Reason Modulus of elasticity is a material property.

Assertion If length of a wire is halved, its Young's modulus of elasticity will become two times. Reason The ratio of longitudinal stress and longitudinal strain is called Young's modulus of elasticity.

NIKITA PUBLICATION-ELASTICITY-MCQ
  1. The longitudinal extention of any elastic material is very small.In or...

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  2. In MKS system, unit of Young's modulus is

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  3. What are dimensions of Young's modulus of elasticity?

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  4. A steel wire is stretched by 1 kg wt. If the radius of the wire is dou...

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  5. The poisson's ratio cannot have the value

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  6. The Poisson's ratio is defined as

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  7. The only elastic modulus that applies to fluids is

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  8. Two identical wires of substances 'P' and 'Q' are subjected to equal s...

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  9. A wire of length L and radius r suspended from rigid support of mass M...

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  10. The reason for the change in shape of a regular body is

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  11. The compressibility of a material is B.A cube of side 'a' is made with...

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  12. A metal rod undergoes an elastic strain of 0.04% and the Young's modu...

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  13. A rubber cube of side 10 cm has one side fixed to a horizontal surface...

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  14. The Young's modulus of a material is 10^(11)N//m^(2) and its Poisson's...

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  15. Volume elasticity is possessed by

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  16. A steel wire of length 2.5 m and area of cross section 1.25 mm^(2), wh...

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  17. A metal wire is observed to stretch by one part in a million when subj...

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  18. A metal wire 4m long and 2xx10^(-7)sq.m in cross-section is stretched ...

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  19. Two rods of different materials having coefficient of thermal expansio...

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  20. The length of a metal wire is l(1) when the tension in it is T(1) and ...

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