Polystyrene has dielectric constant 2.6 and dielectric strength 2.0 × 107 v/m. a piece of polystyrene is used as a dielectric in a parallel-plate capacitor, filling the volume between the plates. part a when the electric field between the plates is 75 % of the dielectric strength, what is the energy density of the stored energy?

2,589 J/m³

This is a matter of calculating the energy density of stored energy in a parallel-plate capacitor.

Given:

Question:

The energy density

The Process:

The expression for the energy density inside a dielectric  is

Permittivity, i.e., with vacuum permittivity

Let's calculate the permittivity and the electric field.

Both data are substituted into the formula to calculate the energy density of stored energy.

Hence, we get

Keywords: polystyrene, dielectric constant, strength, a parallel-plate capacitor, electric field, energy density, the stored energy, relative permittivity, vacuum

2b2t

explanation:

2b2t