The correct answer is: A. increases.
Dielectric strength is the maximum electric field strength that a material can withstand without breaking down and becoming conductive. It is usually measured in volts per meter (V/m).
The dielectric strength of a material is affected by a number of factors, including the material’s composition, temperature, and thickness. In general, the dielectric strength of a material increases with increasing thickness. This is because the electric field strength is inversely proportional to the thickness of the material.
For example, if the thickness of a material is doubled, the electric field strength required to break down the material will be halved. This is because the electric field lines are spread out over a larger area, and the electric field strength at any point is therefore lower.
There are a number of practical applications of dielectric strength. For example, dielectric strength is used to design capacitors and other electrical components. It is also used to select materials for insulation in electrical equipment.
Here is a brief explanation of each option:
- Option A: Dielectric strength increases with increasing thickness. This is because the electric field strength is inversely proportional to the thickness of the material.
- Option B: Dielectric strength decreases with increasing thickness. This is not the case, as dielectric strength increases with increasing thickness.
- Option C: Dielectric strength remains unaltered with increasing thickness. This is also not the case, as dielectric strength increases with increasing thickness.
- Option D: None of the above. This is the correct answer, as dielectric strength increases with increasing thickness.