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U - shaped film of a liquid is formed be...

U - shaped film of a liquid is formed between a wire frame and movable wire 5 cm long. Then the force required to hold the wire in equilibrium is ,
(Surface tension of liquid is 0.024 N/m )

A

`2.4 xx 10^(-3)` N

B

` 24 xx 10^(-3)` N

C

` 2. 4 xx 10^(-3)` dyne

D

` 2.4 xx 10^(-3)` dyne/cm

Text Solution

Verified by Experts

The correct Answer is:
A
` T = F/(2l)`
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NIKITA PUBLICATION-SURFACE TENSION-Multiple Choice Questions (Expression for surface tension )
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  7. A capillary tube of radius R is immersed in water and water rises in i...

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  8. A U-shaped wire is dipped in a soap solution, and removed. A thin soap...

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  9. If a capillary tube of radius 2 xx 10^(-4) m is is dipped vertically...

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  10. Pure water rises in a capillary tube upto a height of 8 cm . If surfa...

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  11. A capillary tube of internal radius 2 xx 10^(-3) m immersed vertic...

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  12. The capillary rises are found to be in the ration of 3:2 when two cap...

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  13. A narrow capillary tube when dipped in beaker containing water, the ri...

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  14. The U-tabe with limbs of diameters 5 mm and 2 mm contains water of sur...

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  15. Water rises to a height of 2 cm in a capillary tube . If its diameter ...

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  16. Surface tension of water is 0.07 N/m . The weight of water supported ...

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  17. If a capillary tube is 45^(@) and 60^(@) from the vertical then the ra...

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  18. Alcohol of density 8 xx 10^(4) kg//m^(3) and surface tension 22 xx 1...

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

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  20. Water rises to a height h in a capillary tube when dipped vartically ...

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