Quiz 1 Summary & Reviews

Question 1

AC can be transformed to

Answer 1

DC

and DC can not be transformed to AC

Question 2

AC reverses its direction of flow at

Answer 2

periodic intervals

Question 3

The most common AC waveform is

Answer 3

the sine wave

Question 4

There are 360 degrees in one

Answer 4

complete sine wave.

Question 5

One complete waveform is called a

Answer 5

cycle

Question 6

The number of complete cycles that occur in 1 second is called

Answer 6

frequency

Question 7

Sine waves are produce by

Answer 7

rotating machines.

Question 8

Frequency is measured in

Answer 8

hertz (Hz)

Question 9

The instantaneous voltage at any point on a sine wave is equal to the peak or

Answer 9

Maximum, voltage times the sine of the angle of rotation.

Question 10

The peak to peak is the amount of voltage measured from the

Answer 10

positive-most peak to the negative-most peak.

Question 11

The peak value is the maximum amount of voltage

Answer 11

attained by the waveform.

Question 12

The RMS value of voltage will produce as much power as a

Answer 12

like amount of DC voltage

Question 13

The average value of voltage is used when an

Answer 13

AC wave is changed into DC.

Question 14

The voltage and current in a pure resistive circuit are

Answer 14

in phase with each other.

Question 15

True power ,or watts ,can be produced only when current and voltage
are

Answer 15

both positive or both negative.

Question 16

Resistance is AC circuits is characterized by the fact that the

Answer 16

the resistive part will produce heat.

Question 17

There are three basic type of AC loads:

Answer 17

resistive , inductive, and capacitive

Question 18

The electrons in an AC circuit are force toward the outside of the conductor by what?

Answer 18

eddy current induction in the conductor itself.

Question 19

Skin effect is proportional to

Answer 19

frequency.

Question 20

Most of the electric power generated in the world is

Answer 20

AC.