All Flashcards
What happens to the electric force between two charges if the distance between them is doubled?
The electric force is reduced to one-fourth of its original value.
What happens to the electric field within a material with a high relative permittivity?
The electric field is weaker compared to a vacuum.
What happens to the capacitance of a capacitor when a dielectric material is removed?
The capacitance decreases.
What happens to the potential difference across a capacitor if the dielectric is removed and the charge remains constant?
The potential difference increases.
Define Coulomb's Law constant (k).
A constant that simplifies calculations in electrostatics, approximately 8.9875 x 10^9 N⋅m²/C².
Define Permittivity (ε).
A measure of how much a material allows an electric field to exist within it.
Define Relative Permittivity (εr).
Also known as the dielectric constant (κ), it indicates how much better a material is at storing electrical energy compared to a vacuum. εr = ε/ε₀
Define Permeability (μ).
A measure of how easily a material allows a magnetic field to flow.
Define Coulomb's Law.
Describes the force between two charged particles: F = k (q1q2) / r²
What are the key differences between Permittivity and Permeability?
Permittivity: How much a material 'resists' electric fields. | Permeability: How much a material 'allows' magnetic fields.
Compare Relative Permittivity to the Permittivity of Free Space.
Relative Permittivity: A material's electrical storage rating compared to a vacuum. | Permittivity of Free Space: Permittivity in a vacuum (ε₀).