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There are two thin films A of liquid and...

There are two thin films A of liquid and B of polythene, identical in size they are being pulled with same maximum weight W. if the breadth of the films is increased from b to 2 b then the corresponding weights will be respectively

A

W,W

B

`(W)/(2),(W)/(2)`

C

`(W)/(2),W`

D

`W,(W)/(2)`

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The correct Answer is:
D
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ALLEN -ELASTICITY, SURFACE TENSION AND FLUID MECHANICS-Exercise 2 (One or more than one correct answer)
  1. In a U-tube diamter of two limbs are 0.5 cm and 1 cm respectively and ...

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  2. When water rises in a capillary tube of radius r to height h, then its...

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  3. There are two thin films A of liquid and B of polythene, identical in ...

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  4. A capillary of the shape as shown is dipped in a liquid. Contact angle...

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  5. The spring balance A reads 2 kg with a block m suspended from it. A ba...

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  6. A steel ball is floating in a trough of mercuty. If we fill the empty ...

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  7. A ballong filled with air is weighted so that it barely floats in wate...

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  8. A small bulb is placed at the bottom of a tank containing water to a d...

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  9. A solid uniform ball having volume V and density rho floats at the int...

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  10. A sperical ball of radius r and relative density 0.5 is floating in eq...

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  11. Three blocks, labeled A, B and C are floating in water as shown in the...

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  12. The cylindrical tube of a spray pump has radius R, one end of which ha...

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  13. A ballong filled with air is weighted so that it barely floats in wate...

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  14. A cylindrical container of radius 'R' and height 'h' is completely fil...

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  15. A small uniform tube is bent into a circle of radius r whose plane is ...

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  16. A U-tube of base length l filled with the same volume of two liquids o...

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  17. A U-tube of base length l filled with the same volume of two liquids o...

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  18. A non-uniform rod of mass m, length l and radius r is having its centr...

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  19. A square box of water has a small hole located the bottom corners. Whe...

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  20. Water filled in an empty tank of area 10 A through a tap of cross sect...

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