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# Electrical Vocab.

### 3rd Period Engineering/Robotics J.T.

TermDefinition
Amp (ampere) unit of electrical current equal to a flow of one coulomb per second
Voltage an electromotive force or potential difference expressed in volts
Ohm the SI unit of electrical resistance, expressing the resistance in a circuit transmitting a current of one ampere when subjected to a potential difference of one volt
Resistor device having a designed resistance to the passage of an electric current
Parallel circuit closed circuit in which the current divides into two or more paths before recombining to complete the circuit
Series circuit closed circuit in which the current follows one path
Capacitor device used to store an electric charge, consisting of one or more pairs of conductors separated by an insulator
Ohm's law law stating that electric current is proportional to voltage and inversely proportional to resistance
AC current (alternating) electric current which periodically reverses direction
DC current (direct) electric current flowing in one direction only
Watt the SI unit of power, equivalent to one joule per second, corresponding to the power in an electric circuit in which the potential difference is one volt and the current one ampere
Circuit path in which electrons from a voltage or current source flow
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
Conductor material or device that conducts or transmits heat, electricity, or sound well
Insulator substance or device which does not readily conduct electricity
Joules (electrical) SI unit of work or energy, equal to the work done by a force of one newton when its point of application moves one meter in the direction of the action of the force, equal to one 3600th of a watt-hour
Coulomb the SI unit of electric charge, equal to the quantity of electricity conveyed in one second by a current of one ampere
Resistance an electrical quantity that measures how the device or material reduces the electric current flow through it
Transistor a semiconductor device with three connections, capable of amplification in addition to rectification
Hertz the number of cycles per second; the SI unit of frequency, equal to one cycle per second
Created by: Jessickmon

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