Home
Class 11
PHYSICS
A large force is required to draw apart ...

A large force is required to draw apart normally two glass plates enclosing a thin water film. Why?

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:
C
The two glass plates stick together due to surface tension.
Promotional Banner

Topper's Solved these Questions

  • SURFACE TENSION

    ERRORLESS|Exercise PAST YEARS QUESTIONS|12 Videos

  • SIMPLE HARMONIC MOTION

    ERRORLESS|Exercise Assertion & Reason|15 Videos

  • THERMODYNAMICS

    ERRORLESS|Exercise ASSERTION AND REASON|20 Videos

Similar Questions

Explore conceptually related problems

In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c ) If assertion is true but reason is false. (d) If assertion and reason are false. Q. Assertion: A large force is required to draw apart normally two glass plates enclosing a thin water film. Reason: Water works as glue and sticks two glass plates.

What is the force required to separate two glass plates of area 3 xx 10^(-2) m^(2) with a film of water of thickness 0.07 mm between them ? (Surface tension of water = 7 xx 10^(-2) N/m )

A force of 10 N is requrid to draw rectangular glass plate on the surface of a liquid with some velocity. Force needed to draw another glass plate of 3 times length and 2 times width is

Calculate the force required to separate the galss plates of area 10^(-2)m^(2) with a film of water 0.05 mm thickness between them (surface tension of waer =70xx10^(-3)N//m) )

Find the minimum force required to drag a hard polythene plate of area 2 m^(2) on a thin film of oil of thickness 0.25 cm and eta= 15 poise. Assume the speed of the plate is 10 cm s^(-1) .

The minimum force required to separate a light glass plate of perimeter 5m from a water surface is (Given surface tension of water = 70 xx 10^(-3) N/m)

If the force required to pull out a glass plate of length 9.8 cm and thickness 2 mm from a liquid is 0.6 gmwt. The surface tension of water is Nm^(-1)

The force required to take away a flat circular plate of radius 2 cm from the surface of water, will be (the surface tension of water is 70 dyne/cm)

A small drop of water of surface tension S is squeezed between two clean glass plates so that a thin layar of thickness d and area A is formed between them. If the angle of contact is zero, what is the force required to pull the plates apart?

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