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When a soap bubble is charged :-...

When a soap bubble is charged :-

A

it contracts

B

it expands

C

It does not undergo any change

D

it bursts

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • When two soap bubbles coalesce to form a single bubble then its radius will be-

    A
    0
    B
    `oo`
    C
    `(r)/(2)`
    D
    `sqrt2r`

  • Assertion : When two soap bubbles having different radii are kept in contact , the common surface at their interface will bulge into a large bubble . Reason : Pressure inside the smaller bubble is larger .

    A
    Assertion is True , Reason is True , Reason is a correct explanation for Assertion
    B
    Assertion is true , Reason is true , Reason is not a correct explanation for Assertion
    C
    Assertion is True , Reason is False
    D
    Assertion is false , Reason is true.

  • A charged soap bubble having surface charge density sigma and radius r . If the pressure inside and outside the soap bubble is the same, then the surface tension of the soap solution is

    A
    `T = (sigma^(2) R )/( 8 epsilon_(0))`
    B
    `T = (sigma^(2) R )/( 4 epsilon_(0))`
    C
    `T = (sigma^(2) R )/(2 epsilon_(0))`
    D
    `T = (sigma^(2) R )/(epsilon_(0))`

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