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The figure shows a soap film in which a ...


The figure shows a soap film in which a closed elastic thread is lying. The film inside the thread is pricked. Now the sliding wire is moved out so that the surface area increases. The radius circle of the circle formed by elastic thread will

A

increase

B

decreases

C

remains same

D

data insufficient

Text Solution

Verified by Experts

The correct Answer is:
C
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ALLEN -ELASTICITY, SURFACE TENSION AND FLUID MECHANICS-Exercise 2 (One or more than one correct answer)
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  2. A steel rod of cross-sectional area 16 cm^(2) and two brass rods each ...

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  3. The figure shows a soap film in which a closed elastic thread is lying...

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  4. Water rises in a capillary tube to a certain height such that the upwa...

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  5. In a U-tube diamter of two limbs are 0.5 cm and 1 cm respectively and ...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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