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A wire elongates by l mm when a load W i...

A wire elongates by l mm when a load W is hanged from it. If the wire goes over a pulley and two weights W each are hung at the two ends, the elongation of the wire will be (in mm)

A

l

B

2l

C

zero

D

`(l)/(2)`

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The correct Answer is:
A
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ALLEN -ELASTICITY, SURFACE TENSION AND FLUID MECHANICS-Exercise 5 A (Previous year Questions)
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  8. If te terminal speed of a sphere of gold (density =19.5kg//m^(3)) is 0...

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  9. A spherical solild of volume V is made of a material of density rho(1)...

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  10. A jar is filled with two non-mixing liquids 1 and 2 haivng densities r...

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  11. A capillary tube (A) is dipped in water. Another identical tube (B) is...

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  12. A spherical solid ball of volume V is made of a material of density rh...

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  13. Two wires are made of the same material and have the same volume. Howe...

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  14. A ball is made of a material of density rho where rho(oil)ltrholtrho(w...

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  15. Water is flowing continuously from a tap having an internal diameter 8...

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  16. Work done in increasing the size of a soap bubble from a radius of 3cm...

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  17. Two mercury drops (each of radius r) merge to form a bigger drop. The ...

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  18. if a ball of steel (density rho=7.8 g//cm^(3)) attains a terminal velo...

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  19. A thin liquid film formed between a U-shaped wire and a light slider s...

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  20. There is a circular tube in a vertical plane. Two liquids which do not...

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