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The excess pressure inside a spherical s...

The excess pressure inside a spherical soap bubble of radius 1 cm is balanced by a column of oil (specific gravity `=0.8`), 2 mm high, the surface tension of the bubble is

A

3.9 N/m

B

`3.9xx10^(-4) N//m`

C

`3.9xx10^(-4) N//m`

D

3.9 dyne/m

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The correct Answer is:
B
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ERRORLESS -SURFACE TENSION-Exercise
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  2. If two soap bubbles of different radii are connected by a tube

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  4. In Jager's method, at the time of bursting of the bubble

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  5. The excess pressure inside a soap bubble is thrice the excess pressur...

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  6. When two capillary tubes of different diameters are dipped vertically,...

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  7. A liquid rises in a capillary tube when the angle of contact is:

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  8. In the state of weightlessness, a capillary tube is dipped in water, t...

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  9. Two parallel glass plates are dipped partly in the liquid of denstiy '...

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

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  11. It is not possible to write directly on blotting paper or newspaper w...

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  12. Two capillary tubes P and Q are dipped in water. The height of water l...

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  13. Two capillaries made of same material but of different radii are dippe...

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  14. Two capillaries made of the same material with radii r(1) =1mm and r(2...

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  15. When a capillary is dipped in water, water rises to a heig ht h . If t...

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  16. Water rises upto 10 cm height in a long capillary tube. If this tube i...

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  17. A vessel, whose bottom has round holes with diameter of 0.1 mm , is fi...

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  18. Water rise in capillary tube when its one end is dipped vertically in ...

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  19. A capillary tube, made of glass is dipped into mercury. Then

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  20. By inserting a capillary tube upto a depth l in water, the water rises...

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