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On stretching some substances, permanent...

On stretching some substances, permanent elongatiion is caused, because

A

they are perfectly elastic

B

they are perfectly plastic

C

more stress acts on them

D

their strain in infinite

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The correct Answer is:
B
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MOTION-ELASTICITY-EXERCISE -1
  1. A steel wire is stretched by 1 kg wt. If the radius of the wire is dou...

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  2. On withdrawing the applied force on some objects, the deformity caused...

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  3. On stretching some substances, permanent elongatiion is caused, becaus...

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  4. Out of the following materials, whose elasticity is independent of tem...

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  5. A cable that can support a load W is cut into two equal parts .T he ma...

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  6. The following four wires are made of the same material. Which of these...

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  7. The dimensional formula for compressibility is

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  8. The potential energy of a weight less spring compressed by a distance ...

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  9. A rod of length l and area of cross-section A is heated from 0^(@)C to...

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  10. When a wire is stretched, an amount of work is done. What is the amoun...

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  11. How many times is the adiabatic modulus of elasticity of gas as compar...

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  12. An iron bar of length l cross section 'A' and young's modulus Y is pu...

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  13. On withdraw in the external applied force on bodies within the elastic...

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  14. Elasticity is the property which is caused by

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  15. The effect of temperature on the value of modulus of elasticity for va...

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  16. The number of independent elasctic constants of a solid is

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  17. Ratio of isothermal elasticity of gas to the adiabatic elasticity is

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  18. On abruptly withdrawing the stretching force acting on a wire, its tem...

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  19. The sigma of a material is 0.20. If a longitudinal strain of 4.0xx10^...

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  20. A cylinder is of length l and diameter d. On stretching the cylinder, ...

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