Barbering

The Basics of Electricity

Electricity: A form of energy that produces physical, magnetic, chemical, or thermal effects when in motion. the movement of electrons from one atom to another along a conductor

Electric current: Flow of electricity along a conductor

Conductor: Any material that conducts electricity

Nonconductor: Also known as insulator; a material that does not transmit electricity.

Electric Wire: consist of fine twisted metal threads coovered with silk, plastic, or rubber coating

 

Types of Currents

Direct current: Abbreviated DC; constant, even-flowing current that travels in one direction only and is produced by chemical means.

Alternating: Abbreviated AC; rapid and interrupted current, flowing first in one direction and then in opposite direction; produced by mechanical means and changes direction 60 times per second

 

Converter: an apparatus that changes DC to AC.

rectifier: an apparatus found within a power supply or adapter that converts AC to DC.

 

Electrical Measurements

Voltage or Volt: Abbreviated V, unit that measures the pressure or force that pushes electric current forward through a conductor.

ampere or AMP: Abbreviation A, Unit that measures the strength of an electric current.

Milliampere: Abbreviation mA; 1/1000 of an ampere

OHM: Abbreviated O; unit that measures the resistance of an electric current

Watt: Abbreviated W; unit that measures how much electric energy is being used in one second

Kilowatt: Abbreviated kw; 1,000 watts

 

Safety devices

Fuse: Prevents excessive current from passing through a circuit

Circuit Breaker: Switch that automatically interrupts or shuts off an electric circuit at the first indication of overload

Grounding: Completes an electric circuit and carries current safely away