AC Waveforms Flashcards

1
Q

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

A

Battery

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2
Q

DC

A

Direct Current

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3
Q

Batteries use a chemical to produce a what

A

DC Voltage

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4
Q

Typical batteries provide electromotive force in this range

A

1.5 volts to 24 volts

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5
Q

These batteries provide 1.5 volts

A

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

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6
Q

These batteries provide 12 volts

A

Automotive batteries

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7
Q

The two terminals on a battery are

A

Positive and Negative

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8
Q

The battery provides this to cause current flow in a circuit

A

Electromotive force or voltage

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9
Q

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

A

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

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10
Q

current flowing through the resistor dissipates power as this

A

Heat

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11
Q

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

A

Ohm’s Law

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12
Q

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

A

Joule’s Law

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13
Q

The DC voltage is what as a function of time

A

constant

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14
Q

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

A

time-domain representation

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15
Q

AC

A

Alternating Current

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16
Q

The voltage provided by a power outlet reverses polarity how often

A

60 times a second or 60 Hz

17
Q

The signals carried over a hybrid fiber-coax network are

A

AC Signals

18
Q

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

A

sinusoidal or sine wave

19
Q

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

20
Q

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

A

quasi-square-wave

21
Q

Typical HFC powering voltages are

A

60 volts AC peak or 90 volts AC peak

22
Q

In an AC circuit what direction does the current flow?

A

In both directions

23
Q

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

A

RMS (Root Mean Square) voltage

24
Q

Ohm’s Law

A

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

25
Joule's Law
P=IxE
26
can be used in AC circuits so long as the voltage and current are RMS values.
Joule's Law
27
can be used in AC circuits just as it is used in DC circuits.
Ohm's Law
28
displays AC voltages as a function of time.
The oscilloscope
29
to plot the sum of the two sine waves as a function of frequency
frequency domain
30
designed to display signals in the frequency domain.
Spectrum analyzers