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Free surface of a liquid behaves like a ...

Free surface of a liquid behaves like a stretched membrane and tends to assume smallest possible area due to

A

cohesive force .

B

adhesive force.

C

centripetal force .

D

centrifugal force .

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The correct Answer is:
A
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Why does a liquid surface behave like a stretched membrane ?

why does the free surface of a liquid at rest behave like a stretched elastic membrane?

...........is the property by virtue of which the free surface of the liquid at rest behaves like a stretched elastic membrane tending to contract to occupy minimum surface area.

Surface tension is the property of a liquid by virtue of which free surface of liquid at rest tries to have minimum surface area. In doing so, the free surface of liquid at rest behaves as if it is covered with a stretched membrane. Surface tension (S) of a liquid is measured by from (F) acting on unit length fo a line (l) imagined to be drawn tangentially anywhere on the free surface i.e., S = (F)/(l). S is measured in N m^(-1) Read the above passage and answer the following question : (i)What is the cause of surface tension ? (ii) A wire ring of 30 mm diameter resting flat on the surface of a liquid is raised. The pull required is 1.5 gf more before the film breaks then it is after. What is surface tension of the liquid ? (iii) What are the implication of this phenomenon in day to day life ?

Surface tension in a liquid is due to :

Origin of surface tension of a liquid is due to

Surface tension is the property of a liquid by virtue of which the free space of the liquid at rest tends to have minimum area and as such it behaves as if covered with a stretched membrane. It is measured as the force acting an unit length of a line imagined to be drawn tangentially anywhere on the free surface of liquid at rest. It acts at right angles to this line on both sides and along the tangent to the liquid surface. Raindrops are spherical in shape because each drop tends to acquire maximum surface area : (a) True (b) False

Surface tension is the property of a liquid by virtue of which the free space of the liquid at rest tends to have minimum area and as such it behaves as if covered with a stretched membrane. It is measured as the force acting an unit length of a line imagined to be drawn tangentially anywhere on the free surface of liquid at rest. It acts at right angles to this line on both sides and along the tangent to the liquid surface. When a razor bladed floats on water, then the force of surface tension acts on the circumference of the blade acting tangentially to the liquid surface : (a) True (b) False

Surface tension is the property of a liquid by virtue of which the free space of the liquid at rest tends to have minimum area and as such it behaves as if covered with a stretched membrane. It is measured as the force acting an unit length of a line imagined to be drawn tangentially anywhere on the free surface of liquid at rest. It acts at right angles to this line on both sides and along the tangent to the liquid surface. Surface tension is a scalar quantity : (a) True (b) False

TARGET PUBLICATION-SURFACE TENSION -EVALUATION TEST
  1. Free surface of a liquid behaves like a stretched membrane and tends t...

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  2. A drop of Volume V is pressed between the two glass plates so as to sp...

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  3. Assertion : When two soap bubbles having different radii are kept in c...

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  4. A capillary tube with very thin walls is attached to the beam of a bal...

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  5. One end of a glass capillary tube with a radius r is immersed into wat...

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  6. A capillary tube of radius r is lowered into water whose surface tensi...

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  7. A soap bubble of radius 'r' is blown up to form a bubble of radius 2r ...

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  8. Assertion : Pressure in bubble ( r ) in the atmosphere of pressure...

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  9. Assertion:- Rise of water level in capillary tube should be accounted ...

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  10. In gravity free space. The liquid in a capillary tube will rise to

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  11. Assertion : When there is a thin layer of water between two glass pla...

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  12. A glass capillary tube of radius r is placed vertically touching the s...

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  13. A capillary is dipped in water vessel kept on a freely falling lift, t...

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  14. Two spherical soap bubbles of radii r1 and r2 in vacuume coalesce unde...

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  15. Water rises to height of 5 cm in glass capillary tube . If the area of...

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  16. Suppose that 64 raindrops combine into a single drop . Calculate the r...

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  17. Two separate air bubbles (radii 0.002 cm and 0.004) formed of the same...

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  18. Two soap bubbles A and B are kept in a closed chamber where the air is...

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  19. Two parallel glass plates are held vertically at a small separation d ...

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  20. A glass rod of diameter d1 =1.5 mm is inserted symmetrically into a ...

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  21. When a loop of wire is dipped in a wetting liquid and is taken out. A ...

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