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Electromagnetism

Vocabulary

TermDefinition
Electric Current the flow of charges (electrons) through a conductor; in units of Amperes or Amps (A)
Point Charge a very small volume whose charge acts as if it is concentrated at the center
Magnetic Field a region around a magnetic material or a moving electric charge within which the force of magnetism acts
Solenoid a coil of wire with an electric current running through it
Electromagnet a coil wrapped around an iron core that acts as a magnet when an electric current is running though it
Iron Core increases the strength of the magnetic field within a solenoid
Magnetic Induction process by which a changing magnetic field produces current in a nearby coil of wire (a.k.a. Faraday's Law)
Electric Force attractive (opposite charge) or repulsive force (same) between charged objects
Magnetic Force attractive (opposite poles) or repulsive force (same) between magnetic objects
Motor transforms electric current into motion via electromagnetism
Generator transforms motion into electric current via magnetic induction
Electrical Energy energy of moving electrons (current)
Mechanical Energy the energy associated with the motion of everyday objects (a.k.a. kinetic energy)
Electromagnetism process by which electricity creates magnetism
Permanent Magnet material that keeps its magnetism
Temporary Magnet material that does not keep its magnetism (ex: an electromagnet)
Commutator device that controls the direction of the flow of current through an electric motor
Magnetic Pole one of two opposite ends of a magnet (North or South)
Alternating Current when current flows from a generator, it reverses direction many times a second
Direct Current when current only flows in a single direction, like from a battery
Oersted's Experiment showed moving electrons (current through a wire) could create a magnetic field by interacting with a compass
Magnitude size or amount (number)
Created by: john_bailey720
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