Chapter 1 Flashcards
(11 cards)
What is Electrostatic Induction?
The process in which redistribution of charge takes place within a body when an electrically charged body is brought near it.
This phenomenon occurs without direct contact and leads to polarization of the neutral body.
What is the formula for Electric Flux (dE)?
ФE = E • ds
This formula represents the electric flux through a differential area element.
What does Coulomb’s Law of Electrostatics state?
F = k * (|q1 * q2| / r^2)
Here, k is the electrostatic constant, q1 and q2 are the charges, and r is the distance between them.
What does Gauss’s Theorem state?
Total flux through a closed surface is equal to the net charge enclosed by the closed surface.
Mathematically, this is expressed as ФE = Q_enclosed / ε₀.
What is the electric field due to a long charged line?
E = λ / (2πε₀r)
λ is the linear charge density and r is the distance from the line charge.
Define Electric Field.
A vector field around charged particles that exerts force on other charged particles.
It is represented by E and its unit is Newton per Coulomb (N/C).
What is the electric field for a point charge?
E = k * (|q| / r^2)
k is the electrostatic constant, q is the charge, and r is the distance from the charge.
What is an Electric Dipole?
A pair of equal and opposite charges separated by a distance.
The dipole moment is given by p = q * d, where q is the charge and d is the separation distance.
What is the torque on a dipole in a uniform electric field?
τ = p × E
τ is the torque, p is the dipole moment, and E is the electric field.
What is the stability of a dipole in an electric field?
Stable at 0° and unstable at 90°.
The dipole tends to align with the electric field for stable equilibrium.
Fill in the blank: The electric field due to a plane sheet of charge is _______.
E = σ / (2ε₀)
σ is the surface charge density and ε₀ is the permittivity of free space.
