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Assertion: A tiny drops of liquid resist...

Assertion: A tiny drops of liquid resist deforming forces better than bigger drops
Reason:Excess pressure inside a drop is directly proportional to the Surface tension.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If the assertion and reason both are false.

Text Solution

Verified by Experts

The correct Answer is:
B
When a drop of liquid is poured on a glass plate, the shape of the drop also is governed by the force of gravity. For very small drops, the potential energy due to gravity is insignificant compared to that due to surface tension. Hence, in this case the shape of the drop is determined by surface tension alone and drop becomes spherical
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These questions consist two statements each, printed as Assertion and reason, while answering these question you are required to choose any one of the following four responsis: (a) If both the assertion and reason are true and reason is a true explanation of the assertion. (b) If both the assertion and reason are true but the reason is not the correct explanation of assertion. (c ) If the assertion is true but reason is false. (d) If both the assertion and reason are false. Q. Assertion: Smaller drops of liquid resist deforming forces better than the larger drops. Reason: Excess pressure inside a drop is directly proportional to its surface area.

Statement I: Smaller drops of liquid resist deforming forces better than the larger drops. Statement II: Excess pressure inside a drop is directly proportional to its surface area.

Smaller drops of liquid resist deforming forces better than the larger drops.

Inside a drop excess pressure is maximum in

Internal pressure inside a liquid drop of radius r and surface tension T is

Derive an expression for excess pressure inside a drop of liquid.

The excess pressure in dyne/ inside a liquid drop of radius 2 mm and fsurface tension T is