What is the standard to measure the relative permittivity:
Correct answer: B. Vacuum
- A. Water
- B. Vacuum
- C. Air
- D. Atmosphere
Explanation
The standard to measure the relative permittivity is vacuum. Relative permittivity, also known as dielectric constant, is a measure of how much a material can polarize in response to an electric field compared to a vacuum. In a vacuum, the relative permittivity is defined as 1 by convention. This serves as a reference point for comparing the relative permittivity of other materials.
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Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.
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