Question
Explain in short about electric dipole.

Answer

►A system consisting of two equal and opposite charges at some distance is called electric dipole.
►The total charge of the electric dipole is obviously zero. This does not mean that the field of the electric dipole is zero. Since the charge q and - q are separated by some distance, the electric fields due to them, when added, do not exactly cancel out.

Image
►The product of the magnitude of any electric charge on an electric dipole and the distance (2a) between them is called the electric dipole moment.
►Electric dipole moment $\vec{p}=\overrightarrow{2 a} q$
►SI unit of electric dipole moment is Cm (Coulomb meter), Dimensional formula is $M ^0 L^1 T^1 A^1$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Explain the term ‘drift velocity’ of electrons in a conductor. Hence obtain the expression for the current through a conductor in terms of ‘drift velocity’.
Explain Ohm's law.
An electronically driven loudspeaker is placed near the open end of a resonance column apparatus. The length of air column in the tube is $80\ cm$. The frequency of the loudspeaker can be varied between $20Hz-2kHz$. Find the frequencies at which the column will resonate. Speed of sound in air $= 320m/s.$
A light bulb and a solenoid are connected in series across an ac source of voltage. Explain, how the glow of the light bulb will be affected when an iron rod is inserted in the solenoid.
A thin spherical shell of radius R lying on a rough horizontal surface is hit sharply and horizontally by a cue. Where should it be hit so that the shell does not slip on the surface?
Give an explanation about electric field lines and explain how they can be drawn.
What is the resistance of an intrinsic semiconductor at 0K?
Two cells of emf 10V and 2V and internal resistance $10\Omega$ and $5\Omega$ respectively, are connected in parallel as shown. Find the effective voltage across R. 
Arrange the following electromagnetic waves in the order of their increasing wavelength :
a. $\gamma$-rays
b. Microwaves
c. X-rays
d. Radio waves
How are infra-red waves produced? What role does infra-red radiation play in
i. maintaining the Earth's warmth and
ii. physical therapy?
If water in one flask and castor oil in other are violently shaken and kept on a table, which will come to rest earlier?