Exam 12: Conductors and Insulators

Liquids that are good conductors because of ionization are called ______________.

When R increases with an increase in temperature

A metal that does not change resistance when the temperature increases or decreases

Which of the following cable connectors is universally used in cable television?

The American Wire Gage numbers specify the size of round wire in terms of its diameter and cross-sectional area.

When soldering or desoldering components mounted on a printed circuit board, use a small iron of about 25 W to 30 W rating.

The main function of a wire conductor is to connect a source of applied voltage to a load with minimum IR voltage drop in the conductors.

Which of the following AWG wires has the largest cross-sectional area?

Temperature ______________ states how much the resistance changes for a change in temperature.

Two or more conductors in a common covering form a cable.

What is a result of breakdown in the insulator because of a high potential difference that ruptures the dielectric?

When two or more conductors are formed in a common covering, it is referred to as a

What is the factor that states how much the resistance changes for a change in temperature?

What prevents a wire conductor from coming into contact with any nearby conductor?

Examples of insulators include air, paper, plastics, rubber, mica, and glass, to name a few.

For a given length of wire, the resistance, R, decreases as its diameter and cross-sectional area increase.

No. 000 gage wire has a larger cross-sectional area than No. 1 gage wire.

In our homes, the higher power appliances operate from 240 V because at twice the voltage, only half the current is needed to obtain the required power.

Which of the following is not an insulator?

Substances that have very high resistance, of the order of many megohms, are classed as ______________.