Bissoy.com
Doctors Medicines MCQs Q&A

If P is the polarisation of dielectric material. Then what will be the amount of diploe moment in the volumeΔ V of the material 

If P is the polarisation of dielectric material. Then what will be the amount of diploe moment in the volumeΔ V of the material  Correct Answer PΔ V

CONCEPT: 

  • Dielectrics are non-conducting substances with no charge carriers. In dielectric material, charges are induced due to electrical polarisation.
  • The dipole moment per unit volume is called polarisation for applied external electric field and is denoted by P, and is given by

P = Np

Where N = number of atoms per unit volume, p = Diploe moment of an individual atom

EXPLANATION:

  • Polarisation in the dielectric material is the amount of dipole moment per unit volume

Let P  be the dipole moment per unit volume, for the given volume the total dipole moment can be written as

The total diploe moment  = P × Δ V = PΔ V

  • Hence option 2 is the answer

Related Questions

Which of the following is/are true about dipole? (1) The unit of electric dipole moment is coulomb meter (2) The net charge of the electric dipole is zero (3) The net electric field due to an electric dipole is nonzero. (4) Point diploe is the diploe with a small value of the charge.
The pie chart given below shows the amount spent by a boy on the purchase of six different items. The total amount spent on all these six items is Rs. 54000. The amount spent on a specific item is represented as a degree with reference to the total amount spent on all these six items. Which of the following statement(s) is/are correct? I. The amount spent on article A is Rs.900 less than the amount spent on article B. II. The amount spent on article C is Rs 2400 more than the amount spent on article D. III. The ratio of the amount spent on article B to the amount spent on article E is 4 : 1.
The dielectric material that shows spontaneous and reversible dielectric polarisation are ___________
A dielectric and a conductor are placed in an external electric field of magnitude Eext. The charge density induced at the surface of the dielectric and the conductor are σd and σe respectively.  The net electric field inside the dielectric and the conductor are Ed and Ec respectively. Then, 
If a dielectric resonator has a dielectric constant of 49, then the reflection coefficient of the dielectric resonator is:
The Snell law is applicable for perpendicular polarisation and the Brewster law is applicable for parallel polarisation. State True/False.
The unit of diploe moment is ------------
Due to which of the following the molecules are having zero diploe moment at room temperature 
What is the value of diploe moment of p-Dichlorobenzene?
Two dielectric materials A and B exhibit both ionic and orientational polarizabilities. The variation of their susceptibilities $$\chi \left( { = {\varepsilon _r} - 1} \right)$$   with temperature T is shown in the figure, where $${\varepsilon _r}$$ is the relative dielectric constant. It can be inferred from the figure that
Solid State Physics mcq question image