Resistivity (Mod.3 Sect.2 Part 2) 2 of 2

The resistance of a wire depends on the following: the ____ of the wire, the _______ of the wire, the ____ of the wire's material, and the wire's _____.

The length of a wire affects the resistance of the wire. This is a ____ relationship: if you double the length of a wire, its resistance will also be doubled.

The cross-sectional area of a wire affects the resistance of a wire. This is an _____ relationship: if you increase the cross-sectional area of a wire, its resistance will decrease and vise versa.

_____ is a measure of how much resistance a material has for a given length and cross-sectional area.

Resistivity is represented by the Greek letter __.

The equation that shows how the length, cross-sectional area, and resistivity are related to the resistance of a wire is: ______.

Most pure metals undergo an increase in resistance with an increase in temp. When a metal, such as copper, does this, it's said to have a ________________.

There are some materials that undergo a decrease in resistance when there's an increase in temperature. Those materials are said to have a _______________.

Another effect of temperature on metals and other materials is _____ and _____.

Most materials ______ when their temperature increase.

Most materials _____ when their temperature decreases.

A measure of the amount of increase in volume with a n increase in temperature is called the _____________________.

If a material contracts when it's heated, it has a ___________.

There are two important characteristics of copper wire that aluminum wire can't match: copper wire is a good conductor of ____, and copper used for wire is a _____ material.

In the building construction industry, the maximum current allowed for each wire size is called its _____.

When a material is _____ it is capable of being easily shaped.

Ampacity is the combination of two words: _____ and _____.

Three popular methods of tying cables together are ______, ________, and _____.

In the _______ process, a group or bundle of wires is secured together with individual ties. This method is often used when wiring panels.

In the ________ process, a group or bundle of wires is secured together with a continuous cord that forms loops at regular intervals.

Other wire grouping methods include plastic ties and clips that are used to hold wires together and also hold them to a panel. Prefabricated wire groups called _____ are also available from some manufacturers.

A _____ is a group of wires bundled together to make a single unit.

Some special types of cables are designed for use in high-frequency applications, _____ cables are an example.

The two most popular types of cables are _____ and _____.

The important thing to remember about coaxial cables is to never ____ their two types of hardware.

_________ are special cables that are often used to carry power. (ex. power lines)

Some important parts of a computer system are the pathways used to get information ____ and ____ of the computer,

The pathways in a computer system that are used to carry information in and out of the system are called _______.

A computer _____ is any external device that provides input and output for the computer.

A keyboard and a mouse are examples of an _____ device.

A printer and a monitor are examples of an ____ device.

_________ - has 2 conductors; The outer conductor is a shield made with braided wires. The inner conductor is a solid-copper wire.; some versions have 2 inner conductors

_____ are colored threads that are visible when the insulation is removed from a wire.

A _____ cable consists of several insulated wires connected together to form a flat ribbon.

Some ribbon cables have terminations called _________. They're designed in such a way that unused pins can be purposely snapped off.

A _______ is a device that splits a multi-wire line into several connectors. This makes troubleshooting easier.

Two materials used to make fiber-optic light conductors are _____ and _____.