Dielectric strength

Definition

Dielectric strength is the maximum electric field a dielectric material can withstand without experiencing electrical breakdown. It is usually measured in volts per unit thickness (e.g., V/m or kV/mm).

5 Must Know Facts For Your Next Test

1. Dielectric strength varies with the thickness of the material; thinner materials generally have higher dielectric strengths.
2. It is an intrinsic property that depends on the molecular structure and composition of the dielectric material.
3. The dielectric strength can be affected by temperature, humidity, and impurities within the material.
4. A high dielectric strength indicates a good insulating material, which can prevent current flow in unwanted directions.
5. Common applications include insulation for capacitors and other electrical components to prevent electrical discharge.

Review Questions

• What factors can affect the dielectric strength of a material?
• How does dielectric strength relate to the insulation properties of a material?
• Why is it important for certain materials to have a high dielectric strength?

Related terms

Electric Potential:

The work needed to move a charge from one point to another in an electric field, measured in volts (V).

Capacitance:

The ability of a system to store charge per unit voltage, typically measured in farads (F).

Electrical Breakdown: A process where an insulating material becomes conductive due to an excessive electric field, leading to failure.