Home
Class 11
PHYSICS
A thin wire ring of 3 cm radius float on...

A thin wire ring of 3 cm radius float on the surface of liquid. The pull required to raise the ring before the film breaks is `30.14xx10^(-3)N` more than its weight. The surface tension of the liquid (in `Nm^(-1))` is

A

`80xx10^(-3)`

B

`87xx10^(3)`

C

`90xx10^(3)`

D

`98xx10^(-3)`

Text Solution

Verified by Experts

The correct Answer is:
A
`T=(F)/(4pir)`
Promotional Banner

Topper's Solved these Questions

  • MECHANICAL PROPERTIES OF FLUIDS

    NARAYNA|Exercise EXERCISE - I - (C.W) (CAPILLARITY & CAPILLARY RISE)|10 Videos

  • MECHANICAL PROPERTIES OF FLUIDS

    NARAYNA|Exercise EXERCISE - I - (C.W) (EXCESS PRESSURE INSIDE A LIQUID DROP AND SOAP BUBBLE)|3 Videos

  • MECHANICAL PROPERTIES OF FLUIDS

    NARAYNA|Exercise EXERCISE - I - (C.W) (TERMINAL VELOCITY & VISCOUS FORCE)|2 Videos

  • MATHEMATICAL REVIEW & PHYSICAL WORLD

    NARAYNA|Exercise C.U.Q|13 Videos

  • MECHANICAL PROPERTIES OF SOLIDS

    NARAYNA|Exercise LEVEL-II (H.W)|24 Videos

Similar Questions

Explore conceptually related problems

A wire ring of 3cm redius is rested on the surface of a liquid and then reaised. The pull required is 3.03 g more before the film breaks than it is afterwards. Find the surface tension of the liquid.

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 ?

A thin wire ring of radius of 2m is placed on the surface a liquid. If a force of 4N is required to pull this ring from the surface of liquid (before the liquid film breaks) then the surface tension of liquid is

A 10 cm long wire is placed horizontally on the surface of a liquid and is gently pulled up with a force of 2xx10^(-2) N to keep the wire in equilibrium . The surface tension of the liquid in Nm^(-1) is

A circular loop of thin wire of radius 7 cm is lifted from the surface of a liquid . An additional force of 44 xx 10^(-2) N is required to detach the loop from the surface of the liquid . The surface tension of the liquid in N/m is

A platinum wire ring of radius 2.5 cm floats horizontally on the surface of water . A vertically force of 0.022 N is required to detach the ring from the surface of water . Then surface tension of water is

A wire 10 cm long is placed horizontally on the surface of water. It is gently pulled up with a force of 1.4 xx10^(-2) N to keep It in equilibrium . The surface tension of water is

A wire ring of diameter 14cm is gently lowered on to a liquid surface and then pulled up. When the film just breaks, the force required is 0.0616N . The surface tension of the liquid is