AC Waveforms

Question 1

One familiar source of a direct current (DC) signal is a what

Answer 1

Battery

Question 2

DC

Answer 2

Direct Current

Question 3

Batteries use a chemical to produce a what

Answer 3

DC Voltage

Question 4

Typical batteries provide electromotive force in this range

Answer 4

1.5 volts to 24 volts

Question 5

These batteries provide 1.5 volts

Answer 5

Standard AA, triple-A, and D-cell flashlight batteries

Question 6

These batteries provide 12 volts

Answer 6

Automotive batteries

Question 7

The two terminals on a battery are

Answer 7

Positive and Negative

Question 8

The battery provides this to cause current flow in a circuit

Answer 8

Electromotive force or voltage

Question 9

In a DC circuit, the current always flows directly from here to there

Answer 9

the positive terminal of the voltage source to the negative terminal of the voltage source

Question 10

current flowing through the resistor dissipates power as this

Answer 10

Heat

Question 11

What can be used to determine the relationship between the voltage, resistance, and current.

Answer 11

Ohm’s Law

Question 12

What can be used to determine the relationship between voltage, current, and power.

Answer 12

Joule’s Law

Question 13

The DC voltage is what as a function of time

Answer 13

constant

Question 14

A plot of a signal as a function of time is called

Answer 14

time-domain representation

Question 15

AC

Answer 15

Alternating Current

Question 16

The voltage provided by a power outlet reverses polarity how often

Answer 16

60 times a second or 60 Hz

Question 17

The signals carried over a hybrid fiber-coax network are

Answer 17

AC Signals

Question 18

The particular shape of the AC voltage used for power in a household outlet is a

Answer 18

sinusoidal or sine wave

Question 19

In the case of a sinusoidal voltage such as household AC power, the RMS voltage is what times the peak voltage or 115 volts.

Answer 19

0.707

Question 20

the powering voltage waveform used in hybrid fiber/coax networks.

Answer 20

quasi-square-wave

Question 21

Typical HFC powering voltages are

Answer 21

60 volts AC peak or 90 volts AC peak

Question 22

In an AC circuit what direction does the current flow?

Answer 22

In both directions

Question 23

You must use this of an AC circuit to get the equivalent DC voltage.

Answer 23

RMS (Root Mean Square) voltage

Question 24

Ohm’s Law

Answer 24

I=E/R or E=IxR or R=E/I

Question 25

Joule’s Law

Answer 25

P=IxE

Question 26

can be used in AC circuits so long as the voltage and current are RMS values.

Answer 26

Joule’s Law

Question 27

can be used in AC circuits just as it is used in DC circuits.

Answer 27

Ohm’s Law

Question 28

displays AC voltages as a function of time.

Answer 28

The oscilloscope

Question 29

to plot the sum of the two sine waves as a function of frequency

Answer 29

frequency domain

Question 30

designed to display signals in the frequency domain.

Answer 30

Spectrum analyzers