Understanding Electricity Lesson 7 Conductors

Metals are good conductors, because they have many ___ electrons.

Nonconducting materials are called ___ as well as insulators.

Are all wires conductors?

Are all conductors wires?

What is the standard unit of wire cross-sectional area used in American and English wire tables?

What is the name of a convenient unit for measuring the cross-sectional area of square and rectangular conductors?

A common measure of wire diameter is the ___.

Wires and cables can be classified according to the kind of ___ they have.

A(n) _____ consists of two or more conductors inside a single covering.

What is the name for the electrical resistance of insulation?

The amount of potential difference a layer of insulation can withstand without breaking down is called ___.