Electricity for Air Conditioning & Refrigeration I Glossary of Electrical Trade Terms
Terms in this set (30)
Alternating Current (AC)
An electrical current in which the direction of the electron flow changes on a cyclical basis.
Unit measurement for current flow in an electrical circuit.
The ability of a substance to transmit heat or electricity.
A material through which current will flow easily.
The flow rate of electrons in an electrical circuit.
Direct Current (DC)
An electrical current that flows in only one direction and has a constant magnitude.
The movement of electrons that creates current flow.
A natural occurrence resulting from the motion of electrons due to heat, induction or chemical action.
A coil of wire wound around an iron core which produces a magnetic field whne an electrical current is sent through the coil.
Electomotive Force (EMF)
The force which causes electrons in a conductor to move. (Also called voltage or potential difference.)
A negatively charged atomic particle.
The magnetism produced in a conductor or coil by the flow of current through a conductor. (Also referred to as magnetic induction.)
A material that retards the flow of electrons or electricity.
Law of Electric Charges
Like charges repel and unlike charges attract.
Electric devices that consume electrical energy and converts it into heat, light, sound or magnetism, a form of work.
An electrical terminal or charge having a surplus of electrons.
The unit of measurement of electrical resistance.
An electrical terminal or charge having a deficiency of electrons.
The opposition to current flow.
An electrical device that connects or interrupts an electrical circuit.
The unit measurement of electrical potential or voltage.
The amount of electrival potential difference between two points.
The connection of a branch circuit to a power source.
A circuit which provides an additional path for current flow.
An electrical wire installed which permits electrical curren tflow from an energy source.
An electrical device consisting of a wrap or winding of wire used to convert electrical energy into a magnetic field.
the point where two or more wires are joined together.
Similar to a relay, but the contacts of a contactor are rated for amperages of 10 amps or more.
A complete path for electrons to flow in a circuit or component.
a device that opens a circuit by melting when too much current flow through it.
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