Magnetism And Electromagnetic Induction Flashcards
(14 cards)
Electromagnetic induction
Production of an electromotive force (Potential difference) across an electrical conductor due to its interaction with a magnetic field.
Magnetic field
“Force” field that surrounds each magnet, and is able to exert forces on other magnets (and moving charged particles) in the vicinity.
Magnetic domains
region in which the magneticfields of atoms are grouped together and aligned, caused by Unpaired electron “spins” which give rise to permanent magnetism when they become aligned.
Electromagnet
A magnet created by running a current through a conductor.
Solenoid
A device consisting of multiple loops or “turns” of wire, that when current is run through it functions as an electromagnet.
Faradays Law
Any change in the magnetic environment of a coil of wire will cause a voltage (emf) to be “induced” in the coil.
Generator
A machine that converts mechanical energy into electrical energy by the process of EM Induction.
Alternating current
Electrical Current that “pulses” back and forth in a circuit. Produced by the process of EM Induction.
Electric motor
an electrical machine that converts electrical energy into mechanical energy. Works by running a current through a loop of wire in a magnetic field.
Transformer
A device which changes, converts or “transforms” voltages and currents by the process o
Tesla
SI unit of Magnetic Field Strength
Magnetic flux
The rate of flow of magnetic field lines through a region of space.
Lenz’s Law
A principle stating that an electric current, induced by a source such as a changing magnetic field, always creates a counterforce opposing the force inducing it.
EMF
Electromotive Force—functionally the same as voltage, but created in AC systems by EM Induction
