102E.04 Principles of Electricity

A form of energy that produces light

flow of electrons which moves along a path called a conductor

any electrically powered appliance

Materials that best transport electricity

Material that doesn't allow current to pass through it

A unit of electric strength; number of electrons flowing along the path

A unit of electric pressure; how hard electrons are being forced or pushed by the source

A unit of electric resistance; how difficult it is to push electrons through a conductor

A measure of how much electrical energy or power is being used per second

A unit of electrical power equal to 1000 watts

Negatively charged particles in an atom

A device that converts DC to AC

A device that converts AC to DC

•Most common current used in businesses and in the home
•Electrons flow first in one direction and then in the other
•Main current used in households
•Used in a high frequency (Tesla) device

• Electrons move at an even rate only in one direction
• Example is a battery
• Used in electrotherapy devices such as a galvanic device

The origin of electric power; provides the force to move electrons in the conducting material

Has a positive terminal and a negative terminal; produces only direct current

Most often used in a salon/spa; produces alternating current; uses mechanical energy to produce a flow of electrons

The number of cycles per second in an alternating current

A closed path through which electric current flows

A complete circuit through which electric current can flow

An incomplete circuit that does not allow electric current to flow

Connecting electrical devices in a circuit so that they share the same voltage;
More than one item can be plugged into the same circuit; each item can be run alone or at the same time

Connecting electrical devices in a circuit so that they share the same current;
All loads run at the same time; circuit travels from one load to the next

More current flows than the line is designed to carry

Can occur anytime a foreign conductor comes in contact with a wire carrying current to an appliance

A device that automatically interrupts the flow of electric current when it exceeds a certain level

Device with a fine metal wire that melts and breaks the circuit when overload occurs

A device that detects imbalances in electric current and interrupts the circuit to prevent electric shock

The opposition to the flow of electric current

A safety certification given by Underwriters Laboratories; means the appliance has been certified to operate safely under the conditions specified by the instructions

Adjusts the flow of electric current that can change the volume or intensity of voltage

Transfers electricity by an oscillating magnetic field that connects two or more electrical circuits

An electrical device used to store electrical charge.

Negative and positive poles at the ends of a circuit

Visual representation of the output current that varies intime strength and direction

Waveform with constant amplitude over the pulse duration

Periodic waveform that instantly transitions between two levels of rise and fall times at a steady frequency

Linear wave motion with periodic rise and fall times in a motion that is up-and down or side-to-side

Periodic waveform in which the rise time and fall time are different

Periodic linear waveform that has rise and fall times that are equal

• Stationary electric charge
• Causes sparks or crackling or the attraction of dust or hair

when flammable liquids are in the spark area

• Reusable safety device
• Contains two pieces of metal that contact each other.

the two pieces separate and break the circuit

• Installed in areas where electricity and water could come in contact

preventing electric shock

P -Pull the Pin
A -Aim the hose at base of fire from at least 6 feet away.
S -Squeeze the handle to begin flow of chemical.
S -Spray the chemical discharge back and forth over fire.