All Flashcards
What is the effect of a changing magnetic flux through a loop of wire?
It induces an electromotive force (EMF), which can drive an electric current.
What is the effect of moving a charge through a magnetic field?
The charge experiences a magnetic force, described by the Lorentz force law.
What happens when a coil rotates in a magnetic field?
Mechanical energy is converted into electrical energy, generating electricity (as in a generator).
What are the key differences between electric and magnetic forces?
Electric Force: Acts on any charge, whether moving or stationary; parallel to the electric field. Magnetic Force: Acts only on moving charges; perpendicular to both the magnetic field and the velocity of the charge.
Differentiate between Monopole and Dipole Fields.
Monopole Field: Field produced by a single magnetic charge (theoretical). Dipole Field: Field produced by two opposite magnetic poles (like in a bar magnet).
Define Electric Field (E).
The force per unit charge; a vector field with magnitude and direction.
Define Magnetic Field (B).
A vector field that exerts a force on moving charges.
Define Faraday's Law.
A changing magnetic flux through a loop of wire induces an electromotive force (EMF). Mathematically:
Define Lenz's Law.
The induced current flows in a direction that opposes the change in magnetic flux that produced it.
Define Magnetic Flux (ΦB).
The product of the magnetic field strength and the area perpendicular to the field: .
Define Lorentz Force Law.
The force on a moving charge in a magnetic field: .