Question 1

Most ac generators have ____________________ field windings.

Accepted Answer

rotating

Question 2

The commutators of dc generators are usually rated at less than ____________________ amperes (A).

Accepted Answer

8000

Question 3

If the generator has two pairs of poles, then a cycle is generated every half-revolution, or 2 hertz per second.

Accepted Answer

A cycle is generated every half-revolution, so the frequency is 2 hertz per second.

Question 4

A basic knowledge of trigonometry is essential to an understanding of alternating-current concepts.

Accepted Answer

Trigonometry is essential for understanding alternating current (AC) concepts because AC waveforms are often sinusoidal, and trigonometry provides the tools to analyze and predict the behavior of these waveforms in circuits.

Question 5

The use of ____________________'s generator rule shows that an alternating voltage is generated in the coil as it rotates.

Accepted Answer

The answer of The use of ____________________'s generator rule shows...

Question 6

Identify and explain the formula used to express the frequency of an ac generator.

Accepted Answer

The answer of Identify and explain the formula used to...

Question 7

What is the definition of alternating current?

Accepted Answer

The answer of What is the definition of alternating current?...

Question 8

What is the advantage of using a higher-frequency?

Accepted Answer

The answer of What is the advantage of using a...

Question 9

The amount of voltage induced in a conductor is proportional to what three factors?

Accepted Answer

The answer of The amount of voltage induced in a...

Question 10

In electronics, the frequencies used cover a very narrow range.

Accepted Answer

In electronics, the frequencies used cover a very wide range, from very low frequencies (like those used in power systems, typically 50 or 60 Hz) to extremely high frequencies (such as those in the GHz range used in radar and microwave communications).

Question 11

Alternating-voltage waveforms are all sine waves.

Accepted Answer

Alternating-voltage waveforms can also be square, triangular, or sawtooth waves, in addition to sine waves.

Question 12

Define alternating voltage.

Accepted Answer

The answer of Define alternating voltage....

Question 13

Direct current is used for various electrochemical processes, including electroplating, refining of copper and aluminum, electrotyping, production of industrial gases by electrolysis, and charging of storage batteries.

Accepted Answer

Direct current (DC) is preferred for electrochemical processes because it allows for the controlled flow of electrons necessary for the reactions involved in processes like electroplating, metal refining, electrotyping, production of gases by electrolysis, and battery charging.

Question 14

One ____________________ represents an amount of magnetic flux equal to 100,000,000 lines.

Accepted Answer

The answer of One ____________________ represents an amount of magnetic...

Question 15

Traction motors require ____________________ current.

Accepted Answer

The answer of Traction motors require ____________________ current....

Quiz 1: Introduction to Alternating Current