Dielectrics inside a parallel plate capacitor

Thread starter polibuda
Start date Nov 27, 2020
Tags

Capacitor Dielectrics Parallel Parallel plate Parallel plate capacitor Plate

In summary, a dielectric material is an insulating material that can be polarized in an electric field and is commonly used in parallel plate capacitors to increase their capacitance. Dielectric materials affect capacitance by reducing the electric field between the plates, and some common materials used in parallel plate capacitors include air, paper, plastic, and ceramic. The dielectric constant of a material affects its use in a parallel plate capacitor as it determines its ability to store electrical energy. Dielectric materials can also increase the breakdown strength of a parallel plate capacitor by reducing the electric field between the plates.

Nov 27, 2020

polibuda

Homework Statement: Determine the leakage current density, power loss density and total losses
power in a two-layer parallel plate capacitor.

Relevant Equations: εr1=3, εr2=6
ρ1=108Ωm, ρ2=0,5108Ωm,d1=d2= 3 mm
s=50 cm^2
U=1,2kV

Could somebody check my solution?

Physics news on Phys.org

Nov 27, 2020

mjc123

Science Advisor

Homework Helper

" ρ1=108Ωm, ρ2=0,5108Ωm,d1=d2= 3 mm"

Did you mean ρ1=10⁸ Ωm, ρ2=0,5x10⁸ Ωm? Then write that!

1. What is a dielectric and why is it used in a parallel plate capacitor?

A dielectric is an insulating material that is placed between the two plates of a parallel plate capacitor. It is used to increase the capacitance of the capacitor by reducing the electric field between the plates.

2. How does a dielectric affect the capacitance of a parallel plate capacitor?

A dielectric increases the capacitance of a parallel plate capacitor by reducing the electric field between the plates. This is because the dielectric material has a higher permittivity, which allows it to store more electric charge.

3. What is the role of the dielectric's thickness in a parallel plate capacitor?

The thickness of the dielectric affects the capacitance of a parallel plate capacitor. A thicker dielectric will increase the capacitance, while a thinner dielectric will decrease the capacitance.

4. How does the dielectric constant of a material affect its suitability for use in a parallel plate capacitor?

The dielectric constant, also known as the relative permittivity, is a measure of how well a material can store electric charge. A higher dielectric constant means that the material is more suitable for use in a parallel plate capacitor, as it can store more charge and increase the capacitance.

5. Can any material be used as a dielectric in a parallel plate capacitor?

No, not all materials can be used as a dielectric in a parallel plate capacitor. The material must have a high dielectric constant and be able to withstand high electric fields without breaking down. Common materials used as dielectrics include air, paper, glass, and certain types of plastics.