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electrical vocab

TermDefinition
voltage That force which is generated to cause current to flow in an electrical circuit. It is also referred to as electromotive force or electrical potential. It is measured in volts.
ohm the practical meter-kilogram-second unit of electric resistance equal to the resistance of a circuit in which a potential difference of one volt produces a current of one ampere
resistor A device usually made of wire or carbon which presents a resistance to current flow.
Ohm's law states that when an electric current is flowing through a conductor, such as a wire, the intensity of the current equals the electromotive force driving it, divided by the resistance of the conductor.
watt A unit of measure for indicating the electrical power applied in a circuit.
Conductor electric current can flow freely
Parallel circuit A circuit in which the circuit components are arranged in branches so that there is a separate path to each unit along which electrical current can flow.
Coulomb the SI unit of electric charge, equal to the quantity of electricity conveyed in one second by a current of one ampere.
Hertz a unit of frequency equal to one cycle per second
Transistor A device constructed of semi - conductors that is used in circuits to control a larger current by using a smaller current for operation.
Resistance The opposing or retarding force offered by a circuit or component of a circuit to the passage of electrical current through it. It is measured in ohms.
AC current an electric current which periodically reverses direction
DC current an electrical current that flows only in one direction.
Electrical Ground an electrical conductor placed in the ground or earth to protect consumers from unfortunate electrical shocks and to provide return path for electrical current
Insulator A substance or body that resists the flow of electrical current through it.
Joules(electrical) the unit of energy
Capacitor A device which stores electrical energy. Commonly used for filtering out voltage spikes.
Amp A device of electronic components used to increase power, voltage, or current of a signal.
Series circuit A circuit in which the parts are connected end to end, positive pole to negative pole, so that only one path is provided for current flow.
Circuit a path in which electrons from a voltage or current source flow