Give reason: The lighting of a lamp is due to the wick of the lamp.

Vedclass pdf generator app on play store
Vedclass iOS app on app store
(N/A) The lighting of a lamp is due to the phenomenon of $Capillarity$.
In a lamp,the wick consists of fine pores or capillaries.
When the lamp is filled with oil,the oil rises up through these fine pores of the wick due to the surface tension of the liquid.
This process is known as capillary action,which allows the oil to reach the flame at the top of the wick,enabling the lamp to burn continuously.

Explore More

Similar Questions

Two vertical parallel plates are partially submerged in water. The distance between the plates is equal to $d$. Water rises due to surface tension $T$,the width of the plates is $l$,and the contact angle of water with glass is $0^o$. Find the force of attraction between the plates.

Difficult
View Solution

Water rises to a height of $10 \, cm$ in a capillary tube and mercury falls to a depth of $3.1 \, cm$ in the same capillary tube. If the density of mercury is $13.6 \, g/cm^3$ and the angle of contact for mercury is $135^{\circ}$,the approximate ratio of surface tensions of water and mercury is

Difficult
View Solution

The water rises in the capillary to a height of $10\, cm$. If the surface tension of water is $73 \times 10^{-3}\, N/m$,density is $10^3\, kg/m^3$ and $g = 9.8\, m/s^2$,then find the radius of the capillary. (in $, cm$)

Wax is coated on the inner wall of a capillary tube and the tube is then dipped in water. Then,compared to the unwaxed capillary,the angle of contact $\theta$ and the height $h$ up to which water rises change. These changes are:

Why does the mercury level fall in a capillary tube? Explain.

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo