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Excess of pressure inside a soap bubble ...

Excess of pressure inside a soap bubble is

A

inversely proportional to its radius

B

directly proportional to its radius

C

directly proportional to square root of its radius

D

independent of its radius

Text Solution

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The correct Answer is:
A
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What is the excess of pressure inside a soap bubble of radius 3cm if the surface tension of the soap solution is 30 dyn/cm ?

A : Excess pressure inside a soap bubble is (4T)/r symbols have their usual meanings). R : The pressure difference across a curved surface of radius of curvature r is (2T)/r) . There are two surfaces in a soap bubble.

Knowledge Check

  • The excess pressure inside a soap bubble is

    A
    inversely proportional to the surface tension
    B
    inversely proportional to its radius
    C
    directly proportional to square of its radius
    D
    inversely proportional to square of its radius

  • If the surface tension of a soap solution is 0.03 MKS units, then the excess of pressure inside a soap bubble of diameter 6 mm over the atmospheric pressure will be

    A
    Less than 40 N/m
    B
    Greater than 40 N/m
    C
    Less than
    D
    Greater than `20N//m`

  • The pressure inside a soap bubble is

    A
    equal to atmospheric pressure,
    B
    less then atmospheric pressure,
    C
    greater than atmospheric pressure,
    D
    just double of atmospheric pressure.

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    The excess pressure inside a soap bubble is thrice the excess pressure inside a second soap bubble. What is the ratio between the volume of the first and the second bubble?

    The excess pressure inside a soap bubble is twice the excess pressurre inside a second soap bubble. The volume of the first bubble is n times the volume of the second where n is

    The excess pressure inside a soap bubble is balanced by 4 mm column of water of specific gravity 1. What will be the surface tension of soap solution if the diameter of soap bubble is 6 mm?

    If the excess pressure inside a soap bubble is balanced by an oil column of height 2 cm, then the surface tension of soap solution will be(r=1cm , density of oil =0.8g/cm 3 )

    If the excess pressure inside a soap bubble is three times that of the other bubble, then the ratio of their volumes will be

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