Network Cable Theory 1&2

Question 1

Subatomic particles found in atoms that balance out the positive charge of a proton (within the nucleus) with their negative charge.

Answer 1

Electrons

Question 2

Substance that allows heat or electricity to pass along or through it, for example, cables, wires, metal surfaces, and water.

Answer 2

Conductor

Question 3

A battery or generator that provides electrical power to the circuit. For example, batteries and generators.

Answer 3

Power source

Question 4

A conductor, such as the copper wire.

Answer 4

Path

Question 5

The device that uses the electricity. It is any device that draws current

Answer 5

Load

Question 6

The copper-clad aluminum center of the coaxial cable is this

Answer 6

conductor

Question 7

the electromotive force that causes electrons to flow in a circuit.

Answer 7

Voltage (E)

Question 8

Components of a Circuit; E represents this:

Answer 8

Voltage

Question 9

Components of a Circuit; I represents this:

Answer 9

Current

Question 10

Components of a Circuit; R or Ω (Omega) represents this:

Answer 10

Resistance

Question 11

measured in volts and is designated mathematically as E

Answer 11

Voltage

Question 12

The pressure that causes electrons to flow in a circuit.

Answer 12

Electromotive force

Question 13

the flow of electrons through a conductor

Answer 13

Current

Question 14

measured in Amperes

Answer 14

Current

Question 15

The amount of electrons that pass a given point in the conductor in one second.

Answer 15

Coulomb

Question 16

One coulomb passing through a given point in one second is equivalent to this

Answer 16

One Amp

Question 17

the opposition a material offers to the flow of current

Answer 17

Resistance

Question 18

used to control the amount of amperage in a circuit

Answer 18

Resistance

Question 19

measured in Ohms

Answer 19

Resistance

Question 20

states that current is directly proportional to voltage and inversely proportional to resistance.

Answer 20

Ohm’s law

Question 21

What is the formula for Ohm’s Law

Answer 21

R=E/I or resistance equals voltage divided by current

Question 22

Ohm’s Law calculation; E=

Answer 22

E= I x R

Question 23

Ohm’s Law calculation; I=

Answer 23

I= E/R

Question 24

Ohm’s Law calculation; R=

Answer 24

R= E/I

Question 25

the effect of voltage causing the movement of current for a certain length of time

Answer 25

Power

Question 26

Formula for Power

Answer 26

P = I x E

Question 27

Formula for Power; P represents this:

Answer 27

Power in Watts

Question 28

Formula for Power; I represents this:

Answer 28

Current in Amperes

Question 29

Formula for Power; E represents this:

Answer 29

EMF in Volts

Question 30

In a cable network what component is a Load

Answer 30

Nodes and Amplifiers

Question 31

In a cable network what component is a Power Source

Answer 31

Power Supply

Question 32

In a cable network what component is a Conductor

Answer 32

Coax cable and Taps

Question 33

the exponent or the power to which a fixed number (the base) must be raised in order to produce a given number

Answer 33

Logarithm

Question 34

used for shortening mathematical calculations

Answer 34

Logarithm

Question 35

The exponent of 10 required to equal the number

Answer 35

Logarithm

Question 36

the number of times the base is multiplied by itself.

Answer 36

Exponent

Question 37

he number being raised

Answer 37

Base

Question 38

Any number raised to the exponent 0 is equal to

Answer 38

1

Question 39

Any number raised to the exponent 1 is equal to

Answer 39

Itself

Question 40

Prefixes; Giga

Answer 40

G 10^9

Question 41

Prefixes; Mega

Answer 41

M 10^6

Question 42

Prefixes; Kilo

Answer 42

k 10^3

Question 43

Prefixes; Milli

Answer 43

m 10^-3

Question 44

Prefixes; Micro

Answer 44

µ 10^-6

Question 45

Prefixes; Pico

Answer 45

n 10^-12

Question 46

Prefixes; Nano

Answer 46

p 10^-9

Question 47

by definition, one tenth of a bel

Answer 47

decibel

Question 48

he unit for expressing, in logarithmic terms, the ratio between two power levels

Answer 48

bel

Question 49

10 log(P1/P2)

Answer 49

dB

Question 50

Early television signal levels were measured with a field strength meter calibrated in this

Answer 50

microvolts

Question 51

20 log (E (mV) / 1)

Answer 51

dBmV

Question 52

20 log (E1 (mV)/ E2 (mV))

Answer 52

dBmV

Question 53

Resistance is measured between the center conductor and sheath with the other end shorted when measuring for this:

Answer 53

DC Loop Resistance

Question 54

The difference in voltage between one point and another.

Answer 54

Potential Difference

Question 55

The direction of an electrical field in a radiated wave.

Answer 55

Polarity

Question 56

DC

Answer 56

Direct Current

Question 57

AC

Answer 57

Alternating Current

Question 58

An electrical current, of which the polarity is periodically reversed.

Answer 58

Alternating Current (AC)

Question 59

Types of AC Waveforms

Answer 59

Sine, Square, Quasi-square, Sawtooth wave

Question 60

This waveform represents the characteristics of the voltage/current that feeds your home, powers your power supplies, and the television channels that carry the program information to your customers’ homes.

Answer 60

Sine Wave

Question 61

This waveform is often found within the switching regulator DC output power supplies in amplifiers.

Answer 61

Square Wave

Question 62

A CATV power supply without a load produces a near square wave that combines a non-linear increase and decrease of voltage or current with an extended maximum positive and negative peak value.

Answer 62

Quasi-square Wave

Question 63

This waveform is typically used to drive the horizontal trace on an oscilloscope or spectrum analyzer.

Answer 63

Sawtooth Wave

Question 64

The square root of the arithmetic mean of the squares of a set of values.

Answer 64

Root Mean Square (RMS)

Question 65

a graphical representation of the relationship between two signal attributes

Answer 65

waveform

Question 66

defined as one complete sine wave.

Answer 66

cycle

Question 67

CPS

Answer 67

cycles per second

Question 68

defined as the number of cycles of an AC waveform that occur in one second

Answer 68

Frequency

Question 69

can be defined as the physical length of one cycle of the voltage waveform

Answer 69

Wavelength

Question 70

the amount of time it takes an AC waveform to complete one cycle.

Answer 70

Period (T)

Question 71

the peak value of an AC waveform

Answer 71

Amplitude

Question 72

the position of the amplitude value as related to time

Answer 72

Phase

Question 73

concept is used in every large cable system that uses amplifiers.

Answer 73

Unity Gain

Question 74

The human ear can hear AC waveforms over what range?

Answer 74

16-16,000 Hz

Question 75

Channel 2's analog visual carrier operates at an AC frequency of what?

Answer 75

55.25 MHz

Question 76

the point at which the filament in a light bulb reaches a temperature that causes it to glow is called what?

Answer 76

Incandescence

Question 77

On the graph of an AC waveform, what is displayed on the vertical axis?

Answer 77

Voltage or Current

Question 78

On the graph of an AC waveform, what is displayed on the horizontal axis?

Answer 78

Time

Question 79

The section of a waveform above the horizontal axis generally corresponds to what?

Answer 79

Positive Polarity

Question 80

The section of a waveform below the horizontal axis generally corresponds to what?

Answer 80

Negative Polarity

Question 81

This german physicist was the first to produce radio waves artifically

Answer 81

Heinrich Rudolph Hertz