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If a water drop is kept between two glas...

If a water drop is kept between two glass plates, then its shape is

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • Assertion : When there is a thin layer of water between two glass plates , there is a strong attraction between them . Reason : The pressure between the plate becomes less than atmospheric pressure because pressure inside a bubble or drop is greater than outside pressure.

    A
    Assertion is true , Reason is true, Reason is 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 drop of water of volume V is pressed between the two glass plates so as to spread to an area. A . If T is the surface tension, the normal force required to separate the glass plates is

    A
    `(TA^(2))/(V)`
    B
    `(2TA^(2))/(V)`
    C
    `(4TA^(2))/(V)`
    D
    `(TA^(2))/(2V)`

  • A water drop of 0.05 cm^(3) is squeezed between two glass plates and spreads into area of 40 cm^(2) . If the surface tension of water is 70 dyne cm^(-1) , then the normal force required to separate the glass plates from each other will be

    A
    22.5 N
    B
    45 N
    C
    90 N
    D
    450 N

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    A drop of water of mass m and density rho is placed between two weill cleaned glass plates, the distance between which is d . What is the force of attraction between the plates? (T= surface tension)

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