Home
Class 12
PHYSICS
A rectangular film of liquid is extended...

A rectangular film of liquid is extended from `(4 cm xx 2 cm)` to `(5 cm xx 4 xx cm)`. If the work done is `3 xx 10^(-4)J`, the value of the surface tension of the liquid is

A

`8.0 N m^(-1)`

B

`0.250 N m^(-1)`

C

`0.125Nm^(-1)`

D

`0.2Nm^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Similar Questions

Explore conceptually related problems

The work done in increasing the size of a soap film from 10 cm × 6 cm to 10 cm × 11 cm is 3 xx10^(-4) joule . The surface tension of the film is

Assertion : if work done in increasing th size of a soap film from 10 cm xx 4 cm to 10cm xx8cm is 2xx10^(-4) J, then the surface tension is 5xx10^(-4)N m^(-1) Reason : work done = surface tension xx increase in area .

A rectengular wire frame of size 2 cm xx 2 cm, is dipped in a soap solution and taken out. A soap film is formed, if the size of the film is changed to 3 cm xx 3 cm, calculate the work done in the process. The surface tension of soap film is 3 xx 10^(-2) N/m .

A rectangle wire frame of size 2cm xx 2cm is dipped in a soap solution and taken out. A soap film is changed to 3cm xx 3cm . Calculate the work done in the process. The surface tension of soap film is 3 xx 10^-2 N//m .

A thin liquid film formed between a U -shaped wire and a light slider supports a weight of 1.5xx10^(-2) N (See figure ). The length of the slider is 30 cm and its weight negligible . The surface tension of the liquid film is

A circular loop of a thin wire of radius 7 cm is lifted from the surface of a liquid. An additional force of 44xx10^-2 N is required to detach the loop from the surface of the liquid. The surface tension of the liquid ib n N//m is

A liquid of density 850 kg//m^3 has an unknown surface tension . However , it is observed that if rises three times high in a capillary tube as compared to pure water . If the contact angles for both are same , then the surface tension of liquid is (Surface tension of water = 7.0xx10^(-2) N//m )

The spherical liquid bubble of diameter 4xx10^-3 m has inner and outer pressure as 1.005 and 1 atmosphere respectively. Then the surface tension of the liquid is

A film of soap solution is formed in a rectnagular wire frame of length 10 cm and breadth 5 cm . The surface energy of the film , if the surface tension of soap solution is 0.035 N/m is

Find the work done in blowing a soap bubble of radius 5cm.Surface tension of soap solution is 25 dyne/cm.