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Two wires A and B are made of same mater...

Two wires A and B are made of same material. The wire A has a length l and diameter r while the wire B has a length 2l and diameter r/2. If the two wires are stretched by the same force the elongation in A divided by the elongation in B is

A

1/8

B

1/4

C

4

D

8

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HC VERMA ENGLISH-SOME MECHANICAL PROPERTIES OF MATTER-Objective-1
  1. The breaking stress of a wire depends on

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  2. A wire can sustain the weight of 20 kg before breaking. If the wire is...

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  3. Two wires A and B are made of same material. The wire A has a length l...

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  4. A wire elongates by 1.0 mm when a load W is hanged from it. If this wi...

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  5. A heavy uniform rod is hanging vertically from a fixed support. It is ...

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  6. When metal wire is stretched by a load the fractional change in its vo...

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  7. The length of a metal wire is l1 when the tension in it is T1 and is l...

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  8. A heavy mass is attached to a thin wire and is whirled in a vertical c...

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  9. When a metal wire elongates by hanging a load on it, the gravitational...

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  10. By a surface of a liquid we mean

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  11. An ice cube is suspended in a vacuum in gravity free hall. As the ice...

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  12. When water droplets merge to form a bigger drop

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  13. The dimension ML^-1T^-2 can correspond to

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  14. Air is pushed into a soap bubble of radius r to double its radius. If ...

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  15. If more air is pushed in a soap bubble the pressure in it

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  16. If two soap bubbles of different radii are connected by a tube

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  17. Figure shows a capillary tube of radius r dipped into water. If the a...

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  18. The excess pressure inside a soap bubble is twice the excess pressurre...

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  19. Which of the following graphs may represent the relation between the c...

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  20. Water rises in a vertical capillary tube up to a length of 10 cm. If t...

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