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Identical springs of steel and copper ar...

Identical springs of steel and copper are equally stretched. The spring on which more work is to be done is

A

steel

B

copper

C

same on both

D

insufficient data

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The correct Answer is:
A
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(A): If same work is done on identical springs of steel and copper, steel spring is less elongated. (R) : Steel is less elastic than copper.

(A): A spring has potential energy, both when it is compressed or stretched. (R) : In compressing or stretching, work is done on the spring against the restoring force.

AAKASH SERIES-MECHANICAL PROPERTIES OF SOLIDS-EXERCISE -IA
  1. For an ideal liquid

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  2. The Bulk modulus of a perfect rigid body is

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  3. Identical springs of steel and copper are equally stretched. The sprin...

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  4. The possible value of Poission's ratio is

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  5. Steel is preferred for making springs over copper because

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  6. The Poisson's ratio o should satisfy the relation

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  7. The property of metals whereby they could be drawn into thin wires bey...

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  8. Which of the following affects the elasticity of a substance

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  9. Consider an ideal monoatomic gas of volume V at pressure P. The bulk m...

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  10. If a metal wire is stretched a little beyond its elastic limit (or yie...

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  11. A metal wire of length L, area of cross-section A and Young's modulus ...

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  12. A uniform rod of mass m, length L, area of cross-section A and Young's...

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  13. An elastic metal rod will change its length when it a) falls vert...

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  14. The maximum load a wire can withstand without breaking, when its lengt...

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  15. A body of mass M is attached to the lower end of a metal wire, whose u...

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  16. A spring is stretched by applying a load to its free end. The strain p...

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  17. A rigid bar of mass M is supported symmetrically by three wires each o...

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  18. Consider two cylindrical rods of identicaly dimensions, one of rubber ...

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  19. A mild steel wire of length 2L and cross sectional area A is stretched...

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  20. The stress-strain graphs for two materials are as shown.

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