Energy Density of an Electric Field

Write the correct expression for energy density.

A capacitor of capacitance $20 \mathrm{\mu F}$ is charged to a potential of $500 \mathrm{V}$. Calculate the charge and energy stored in a capacitor.

A capacitor of capacitance $20 \mathrm{\mu F}$ is charged to a potential of $500 \mathrm{V}$. Calculate the charge and energy stored in a capacitor.

The energy density at a point in a medium of dielectric constant $8$ is $26.55\times {10}^6 \frac{\mathrm{J}}{{\mathrm{m}}^3}$. Calculate electric field intensity at that point.

The potential difference between the plates of a parallel plate capacitor is $10 V$ and separation is $5 \mathrm{cm}\mathit{.}$ Find the energy density between plates. $\left({\epsilon }_0={10}^{-11} \mathrm{F} {\mathrm{m}}^{-1}\right)$

Write unit of energy density.

Write expression for energy density for electric field between plates of a parallel plate capacitor

Derive expression for energy stored in charge capacitor.

Establish expression for energy stored per unit volume in electric field.

Where does the energy due to a charge is stored?

Consider a parallel plate capacitor with $20 \mathrm{c}\mathrm{m}$ by $20 \mathrm{c}\mathrm{m}$ plates and separated by $2 \mathrm{m}\mathrm{m}$. The dielectric constant of the material between the plates is $5$. The plates are connected to a voltage source of $500 \mathrm{V}$. The energy density of the field between the plates will be close to

Two condensers, one of capacity $C$ and the other of capacity $\frac{C}{2}$ , are connected to a $V$ -volt battery, as shown.

The work done in charging fully both the condensers is

In an oscillating LC circuit the max. charge on the capacitor is Q. The charge on capacitor when the energy is stored equally between electric and magnetic field is

A point source of electromagnetic radiation has an average power output of 800W. The maximum value of electric field at a distance 3.5 m from the source will be $62.6 V/m,$ the energy density at a distance 3.5 m from the source will be - $\left(in joule/m^3\right)$

A parallel plate capacitor having a plate separation of $2\mathrm{ }\mathrm{m}\mathrm{m}$ is charged by connecting it to $300\mathrm{ }\mathrm{V}$ supply. The energy density is

The dimension of $\left(\frac{1}{2}\right){\mathrm{\epsilon }}_0{\mathrm{E}}^2$ (${\mathrm{\epsilon }}_0\mathrm{ }:\mathrm{ }\mathrm{p}\mathrm{e}\mathrm{r}\mathrm{m}\mathrm{i}\mathrm{t}\mathrm{t}\mathrm{i}\mathrm{v}\mathrm{i}\mathrm{t}\mathrm{y}\mathrm{ }\mathrm{o}\mathrm{f}\mathrm{ }\mathrm{f}\mathrm{r}\mathrm{e}\mathrm{e}\mathrm{ }\mathrm{s}\mathrm{p}\mathrm{a}\mathrm{c}\mathrm{e}$ ; $\mathrm{E}\mathrm{ }:\mathrm{ }\mathrm{e}\mathrm{l}\mathrm{e}\mathrm{c}\mathrm{t}\mathrm{r}\mathrm{i}\mathrm{c}\mathrm{ }\mathrm{f}\mathrm{i}\mathrm{e}\mathrm{l}\mathrm{d})$ is 

The average value of electric energy density in an Electromagnetic Waves is (E0 is peak value)

Energy associated with a moving charge is due to

If $\mathrm{V}$ and $u$ are electric potential and energy density, respectively, at a distance $r$ from a positive point charge, then which of the following graphs is correct?

The value of the electric field strength in vacuum if the energy density is same as that due to a magnetic field of induction 1 T in vacuum is