All Exams Test series for 1 year @ ₹349 only
Question

The electric flux density $\bar{D}$ is measured in

The correct answer is
$C/m^2$

Electric Flux Density Unit Determination

Electric flux density, represented by the vector $\bar{D}$, quantifies the electric flux passing through a specific unit area. It's a key concept in electromagnetism, especially when dealing with materials.

Deriving the Electric Flux Density Unit

  1. Electric flux ($\Psi$) is fundamentally related to the electric charge (Q) that creates it.

  2. Electric flux density ($\bar{D}$) is defined as the electric flux per unit area (A). The formula is often expressed as $|\bar{D}| = \frac{\Psi}{A}$.

  3. The standard unit for electric charge (and thus electric flux) is the Coulomb (C).

  4. The standard unit for area is square meters ($m^2$).

  5. Combining these, the unit for electric flux density ($\bar{D}$) is derived by dividing the unit of flux (C) by the unit of area ($m^2$).

Conclusion: Unit of $\bar{D}$

Therefore, the electric flux density ($\bar{D}$) is measured in Coulombs per square meter, denoted as $C/m^2$.

Was this answer helpful?

Important Questions from Electrostatics

  1. A uniform ring charge of radius $R$ carries a total charge $Q$. Which one of the following options correctly quantifies the magnitude of the force on a point charge of strength $q$ kept at the center of the ring? 

    ($\epsilon$ is the permittivity of the medium)

  2. For a uniform line charge of 8 nc/m lying along the z axis, the electric field at a radius of 3 m from the uniform line is given by :

  3. The current in a coil of inductance 5 H changes linearly from 10 A to 2 A in t seconds. If the induced emf is 40 V, what is the time t?

  4. What are the materials which exhibit electric polarization even in the absence of an applied electrical field?

  5. What is the relative permittivity of slate dielectric?

Need Expert Advice?

Start Your Preparation with Prepp Mobile App

Download the app from Google Play & App Store
Download the app from Google Play & App Store
Prepp Mobile App