Electrical Concepts and Network Devices: Safety, Current, and Components

Server

A computer in a network that is used to provide services to other computers in the network; it is connected directly to the internet.

Alternating Current

Electrons are able to flow in forward or reverse direction. The current alternates back and forth for equal amounts of time.

Battery

A container consisting of one or more cells, in which chemical energy is converted into electricity and used as a source of power.

Client

A computer in a network that uses the services provided by a server; it is connected indirectly to the internet.

Current electricity

Electrical current is a flow of electrons through a pathway or a conductor.

Heat gun

A handheld device that produces a flameless stream of extremely hot air.

Network

A system of computers that are able to communicate with each other directly.

Amperes

The unit used to measure the amount of current; measured in amps (1).

Breadboard

A board for making an experimental model of an electrical circuit.

Circuit

A closed complete pathway for the flow of electrons.

Data Center

A dedicated space within a building or a group of buildings used to house computer systems and associated components, such as telecommunications and storage systems.

Data Packet

A unit of data made into a single package that travels along a given network path.

Direct Current

Electrons are limited to a flow in a single direction. Direct current is typically powered by a battery, where the flow of the electrons travels from the positive terminal to the negative terminal.

Fiber Optics

Thin transparent fibers of glass or plastic that are enclosed by material of a lower refractive index; they transmit light throughout their length by internal reflection with very little loss of strength.

Industrial Revolution

A rapid major change marked by the introduction of power-driven machinery or by changes in existing machines and how we use them.

Input

A place or a device where power or information enters a system.

Internet

A network or system that connects millions of computers worldwide.

IP (Internet Protocol) Address

The numeric address of a computer on the Internet.

Motor

A machine, especially powered by electricity or internal combustion, which supplies motive power for a vehicle or some other device with moving parts.

Multimeter

A device used to measure multiple things, such as voltage, amperage, and ohms.

Needle nose pliers

Pliers with long slender jaws used for grasping small or thin objects, especially for gripping, bending, and cutting electrical wires.

Output

A place where power leaves the system.

Pathway

Can be used to control the flow of electrons in order to do useful work.

Pixel

The smallest controllable element of a picture represented on a screen.

Power

A source or method of supplying energy, especially energy used for doing work.

Resistor

A device having a designed resistance to the passage of an electrical current.

Router

A device that routes data packets over a network.

Splicing

The process of joining two or more wires together to make sure they can carry electricity or signals properly.

Static Electricity

A small electric shock caused when charged particles transfer from one body to another.

Voltage

The 'push' from a battery, measured in volts (V).

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