Energy Density in Electric Field

Write the correct expression for energy density.

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.

In the figure shown $\sigma$ is the surface charge density on the upper metallic plate

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.

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

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 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

The value of the electric field strength in vacuum if, the energy density is same as that due to a magnetic field of induction $1 \mathrm{T}$ vacuum is

In a uniform electric field, a cube of side 1 cm is placed. The total energy stored in the cube is $8·85\mu \text{J}$. The electric field is parallel to four of the faces of the cube. The electric flux through any one of the remaining two faces is.

In a parallel plate capacitor, the distance between the plates is $d$ and potential difference across the plates is $V$. Energy stored per unit volume between the plates of capacitor is