Untitled Flashcards Set

Electric Field (E)

A vector quantity defined as the force per unit charge at a point in an electric field, measured in N/C or V/m.

Potential Difference (ΔV)

The change in electric potential energy per unit charge between two points measured in volts (V).

Work Done (W)

Calculated as W = qV or W = qEd, representing the energy transferred to or from a charged particle in an electric field.

Lorentz Force (F)

The force experienced by a moving charge in a magnetic field, given by F = q(v × B), where v is the velocity and B is the magnetic field.

Right Hand Palm Rule

A method to determine the direction of the Lorentz force: point the thumb in the direction of positive charge motion, fingers in magnetic field direction, palm gives force direction.

Magnetic Flux (Φ)

A measure of the magnetic field passing through an area, calculated as Φ = B·A·cos(θ).

Faraday's Law of Induction

States that the induced electromotive force (emf) in a circuit is proportional to the rate of change of magnetic flux through the circuit.

Back EMF

The induced emf in a motor that opposes the applied voltage, limiting the current and speed of the motor.

Torque (τ)

The measure of the rotational force acting on a coil in a magnetic field, given by τ = nIA·B·sin(θ).

Eddy Currents

Circulating currents induced within conductors exposed to a changing magnetic field, which create opposing magnetic fields.

Electric Field (E)

A vector quantity representing the force experienced per unit charge at a specific point within an electric field, measured in newtons per coulomb (N/C) or volts per meter (V/m).

Potential Difference (ΔV)

The difference in electric potential energy per unit charge between two points, expressed in volts (V).

Work Done (W)

Work is calculated using the equations W = qV or W = qEd, which indicate the energy transferred to or from a charged particle in an electric field.

Lorentz Force (F)

The force acting on a moving charge in a magnetic field, defined by the equation F = q(v × B), where v denotes the velocity of the charge and B represents the magnetic field.

Right Hand Palm Rule

A technique to find the direction of the Lorentz force: extend the thumb in the direction of positive charge movement, align fingers with the magnetic field direction, and the palm indicates the force direction.

Magnetic Flux (Φ)

A quantitative measure of the magnetic field crossing through a specific area, calculated as Φ = B·A·cos(θ).

Faraday's Law of Induction

This law states that the electromotive force (emf) induced in a circuit is directly proportional to the rate at which the magnetic flux changes through the circuit.

Back EMF

The induced electromotive force in a motor that counteracts the applied voltage, helping to regulate the current and speed of the motor.

Torque (τ)

A measure of the twisting force acting on a coil within a magnetic field, calculated using τ = nIA·B·sin(θ), where n is the number of turns, I is the current, A is the area, B is the magnetic field strength, and θ is the angle.

Eddy Currents

These are loops of electrical current created within conductors when they are exposed to a changing magnetic field, resulting in the generation of opposing magnetic fields.