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E5A01
What can cause the voltage across reactances in series to be larger than the voltage applied to them?
0
Resonance
1
Capacitance
0
Conductance
0
Resistance
0

E5A02
What is resonance in an electrical circuit?
0
The highest frequency that will pass current
0
The lowest frequency that will pass current
0
The frequency at which capacitive reactance equals inductive reactance
1
The frequency at which power factor is at a minimum
0

E5A03
What are the conditions for resonance to occur in an electrical circuit?
0
The power factor is at a minimum
0
Inductive and capacitive reactances are equal
1
The square root of the sum of the capacitive and inductive reactance is equal to the resonant frequency
0
The square root of the product of the capacitive and inductive reactance is equal to the resonant frequency
0

E5A04
When the inductive reactance of an electrical circuit equals its capacitive reactance, what is this condition called?
0
Reactive quiescence
0
High Q
0
Reactive equilibrium
0
Resonance
1

E5A05
What is the magnitude of the impedance of a series RLC circuit at resonance?
0
High, as compared to the circuit resistance
0
Approximately equal to capacitive reactance
0
Approximately equal to inductive reactance
0
Approximately equal to circuit resistance
1

E5A06
What is the magnitude of the impedance of a circuit with a resistor, an inductor and a capacitor all in parallel, at resonance?
0
Approximately equal to circuit resistance
1
Approximately equal to inductive reactance
0
Low, as compared to the circuit resistance
0
Approximately equal to capacitive reactance
0

E5A07
What is the magnitude of the current at the input of a series RLC circuit at resonance?
0
It is at a minimum
0
It is at a maximum
1
It is DC
0
It is zero
0

E5A08
What is the magnitude of the circulating current within the components of a parallel LC circuit at resonance?
0
It is at a minimum
0
It is at a maximum
1
It is DC
0
It is zero
0

E5A09
What is the magnitude of the current at the input of a parallel RLC circuit at resonance?
0
It is at a minimum
1
It is at a maximum
0
It is DC
0
It is zero
0

E5A10
What is the relationship between the current through a resonant circuit and the voltage across the circuit?
0
The voltage leads the current by 90 degrees
0
The current leads the voltage by 90 degrees
0
The voltage and current are in phase
1
The voltage and current are 180 degrees out of phase
0

E5A11
What is the relationship between the current into (or out of) a parallel resonant circuit and the voltage across the circuit?
0
The voltage leads the current by 90 degrees
0
The current leads the voltage by 90 degrees
0
The voltage and current are in phase
1
The voltage and current are 180 degrees out of phase
0

E5A12
What is the halfpower bandwidth of a parallel resonant circuit that has a resonant frequency of 1.8 MHz and a Q of 95?
0
18.9 kHz
1
1.89 kHz
0
189 Hz
0
58.7 kHz
0

E5A13
What is the halfpower bandwidth of a parallel resonant circuit that has a resonant frequency of 7.1 MHz and a Q of 150?
0
211 kHz
0
16.5 kHz
0
47.3 kHz
1
21.1 kHz
0

E5A14
What is the halfpower bandwidth of a parallel resonant circuit that has a resonant frequency of 14.25 MHz and a Q of 150?
0
95 kHz
1
10.5 kHz
0
10.5 MHz
0
17 kHz
0

E5A15
What is the halfpower bandwidth of a parallel resonant circuit that has a resonant frequency of 21.15 MHz and a Q of 95?
0
4.49 kHz
0
44.9 kHz
0
22.3 kHz
0
222.6 kHz
1

E5A16
What is the halfpower bandwidth of a parallel resonant circuit that has a resonant frequency of 3.7 MHz and a Q of 118?
0
22.3 kHz
0
76.2 kHz
0
31.4 kHz
1
10.8 kHz
0

E5A17
What is the halfpower bandwidth of a parallel resonant circuit that has a resonant frequency of 14.25 MHz and a Q of 187?
0
22.3 kHz
0
10.8 kHz
0
76.2 kHz
1
13.1 kHz
0

E5A18
What is the resonant frequency of a series RLC circuit if R is 47 ohms, L is 50 microhenrys and C is 40 picofarads?
0
79.6 MHz
0
1.78 MHz
0
3.56 MHz
1
7.96 MHz
0

E5A19
What is the resonant frequency of a series RLC circuit if R is 47 ohms, L is 40 microhenrys and C is 200 picofarads?
0
1.99 kHz
0
1.78 MHz
1
1.99 MHz
0
1.78 kHz
0

E5A20
What is the resonant frequency of a series RLC circuit if R is 47 ohms, L is 50 microhenrys and C is 10 picofarads?
0
3.18 MHz
0
3.18 kHz
0
7.12 kHz
0
7.12 MHz
1

E5A21
What is the resonant frequency of a series RLC circuit if R is 47 ohms, L is 25 microhenrys and C is 10 picofarads?
0
10.1 MHz
1
63.7 MHz
0
10.1 kHz
0
63.7 kHz
0

E5A22
What is the resonant frequency of a series RLC circuit if R is 47 ohms, L is 3 microhenrys and C is 40 picofarads?
0
13.1 MHz
0
14.5 MHz
1
14.5 kHz
0
13.1 kHz
0

E5A23
What is the resonant frequency of a series RLC circuit if R is 47 ohms, L is 4 microhenrys and C is 20 picofarads?
0
19.9 kHz
0
17.8 kHz
0
19.9 MHz
0
17.8 MHz
1

E5A24
What is the resonant frequency of a series RLC circuit if R is 47 ohms, L is 8 microhenrys and C is 7 picofarads?
0
2.84 MHz
0
28.4 MHz
0
21.3 MHz
1
2.13 MHz
0

E5A25
What is the resonant frequency of a series RLC circuit if R is 47 ohms, L is 3 microhenrys and C is 15 picofarads?
0
23.7 MHz
1
23.7 kHz
0
35.4 kHz
0
35.4 MHz
0

E5B01
What is the term for the time required for the capacitor in an RC circuit to be charged to 63.2% of the supply voltage?
0
An exponential rate of one
0
One time constant
1
One exponential period
0
A time factor of one
0

E5B02
What is the term for the time required for the current in an RL circuit to build up to 63.2% of the maximum value?
0
One time constant
1
An exponential period of one
0
A time factor of one
0
One exponential rate
0

E5B03
What is the term for the time it takes for a charged capacitor in an RC circuit to discharge to 36.8% of its initial value of stored charge?
0
One discharge period
0
An exponential discharge rate of one
0
A discharge factor of one
0
One time constant
1

E5B04
The capacitor in an RC circuit is charged to what percentage of the supply voltage after two time constants?
0
36.8%
0
63.2%
0
86.5%
1
95%
0

E5B05
The capacitor in an RC circuit is discharged to what percentage of the starting voltage after two time constants?
0
86.5%
0
63.2%
0
36.8%
0
13.5%
1

E5B06
What is the time constant of a circuit having two 100microfarad capacitors and two 470kilohm resistors all in series?
0
47 seconds
1
101.1 seconds
0
103 seconds
0
220 seconds
0

E5B07
What is the time constant of a circuit having two 220microfarad capacitors and two 1megohm resistors all in parallel?
0
47 seconds
0
101.1 seconds
0
103 seconds
0
220 seconds
1

E5B08
What is the time constant of a circuit having a 220microfarad capacitor in series with a 470kilohm resistor?
0
47 seconds
0
80 seconds
0
103 seconds
1
220 seconds
0

E5B09
How long does it take for an initial charge of 20 V DC to decrease to 7.36 V DC in a 0.01microfarad capacitor when a 2megohm resistor is connected across it?
0
0.02 seconds
1
0.08 seconds
0
450 seconds
0
1350 seconds
0

E5B10
How long does it take for an initial charge of 20 V DC to decrease to 0.37 V DC in a 0.01microfarad capacitor when a 2megohm resistor is connected across it?
0
0.02 seconds
0
0.08 seconds
1
450 seconds
0
1350 seconds
0

E5B11
How long does it take for an initial charge of 800 V DC to decrease to 294 V DC in a 450microfarad capacitor when a 1megohm resistor is connected across it?
0
0.02 seconds
0
0.08 seconds
0
450 seconds
1
1350 seconds
0

E5C01
What type of graph can be used to calculate impedance along transmission lines?
0
A Smith chart
1
A logarithmic chart
0
A Jones chart
0
A radiation pattern chart
0

E5C02
What type of coordinate system is used in a Smith chart?
0
Voltage circles and current arcs
0
Resistance circles and reactance arcs
1
Voltage lines and current chords
0
Resistance lines and reactance chords
0

E5C03
What type of calculations can be performed using a Smith chart?
0
Beam headings and radiation patterns
0
Satellite azimuth and elevation bearings
0
Impedance and SWR values in transmission lines
1
Circuit gain calculations
0

E5C04
What are the two families of circles that make up a Smith chart?
0
Resistance and voltage
0
Reactance and voltage
0
Resistance and reactance
1
Voltage and impedance
0

E5C05
What type of chart is shown in Figure E51?
0
Smith chart
1
Freespace radiation directivity chart
0
Verticalspace radiation pattern chart
0
Horizontalspace radiation pattern chart
0

E5C06
On the Smith chart shown in Figure E51, what is the name for the large outer circle bounding the coordinate portion of the chart?
0
Prime axis
0
Reactance axis
1
Impedance axis
0
Polar axis
0

E5C07
On the Smith chart shown in Figure E51, what is the only straight line shown?
0
The reactance axis
0
The current axis
0
The voltage axis
0
The resistance axis
1

E5C08
What is the process of normalizing with regard to a Smith chart?
0
Reassigning resistance values with regard to the reactance axis
0
Reassigning reactance values with regard to the resistance axis
0
Reassigning impedance values with regard to the prime center
1
Reassigning prime center with regard to the reactance axis
0

E5C09
What is the third family of circles, which are added to a Smith chart during the process of solving problems?
0
Standingwave ratio circles
1
Antennalength circles
0
Coaxiallength circles
0
Radiationpattern circles
0

E5C10
In rectangular coordinates, what is the impedance of a network comprised of a 10microhenry inductor in series with a 40ohm resistor at 500 MHz?
0
40 + j31,400
1
40  j31,400
0
31,400 + j40
0
31,400  j40
0

E5C11
In polar coordinates, what is the impedance of a network comprised of a 100picofarad capacitor in parallel with a 4,000ohm resistor at 500 kHz?
0
2490 ohms, /__51.5_degrees__
0
4000 ohms, /__38.5_degrees__
0
2490 ohms, /__51.5_degrees__
1
5112 ohms, /__38.5_degrees__
0

E5C13
What are the curved lines on a Smith chart?
0
Portions of current circles
0
Portions of voltage circles
0
Portions of resistance circles
0
Portions of reactance circles
1

E5C14
How are the wavelength scales on a Smith chart calibrated?
0
In portions of transmission line electrical frequency
0
In portions of transmission line electrical wavelength
1
In portions of antenna electrical wavelength
0
In portions of antenna electrical frequency
0

E5D01
What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 25 ohms, R is 100 ohms, and XL is 100 ohms?
0
36.9 degrees with the voltage leading the current
1
53.1 degrees with the voltage lagging the current
0
36.9 degrees with the voltage lagging the current
0
53.1 degrees with the voltage leading the current
0

E5D02
What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 500 ohms, R is 1 kilohm, and XL is 250 ohms?
0
68.2 degrees with the voltage leading the current
0
14.0 degrees with the voltage leading the current
0
14.0 degrees with the voltage lagging the current
1
68.2 degrees with the voltage lagging the current
0

E5D03
What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 50 ohms, R is 100 ohms, and XL is 25 ohms?
0
76 degrees with the voltage lagging the current
0
14 degrees with the voltage leading the current
0
76 degrees with the voltage leading the current
0
14 degrees with the voltage lagging the current
1

E5D04
What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 100 ohms, R is 100 ohms, and XL is 75 ohms?
0
14 degrees with the voltage lagging the current
1
14 degrees with the voltage leading the current
0
76 degrees with the voltage leading the current
0
76 degrees with the voltage lagging the current
0

E5D05
What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 50 ohms, R is 100 ohms, and XL is 75 ohms?
0
76 degrees with the voltage leading the current
0
76 degrees with the voltage lagging the current
0
14 degrees with the voltage lagging the current
0
14 degrees with the voltage leading the current
1

E5D06
What is the relationship between the current through and the voltage across a capacitor?
0
Voltage and current are in phase
0
Voltage and current are 180 degrees out of phase
0
Voltage leads current by 90 degrees
0
Current leads voltage by 90 degrees
1

E5D07
What is the relationship between the current through an inductor and the voltage across an inductor?
0
Voltage leads current by 90 degrees
1
Current leads voltage by 90 degrees
0
Voltage and current are 180 degrees out of phase
0
Voltage and current are in phase
0

E5D08
What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 25 ohms, R is 100 ohms, and XL is 50 ohms?
0
14 degrees with the voltage lagging the current
0
14 degrees with the voltage leading the current
1
76 degrees with the voltage lagging the current
0
76 degrees with the voltage leading the current
0

E5D09
What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 75 ohms, R is 100 ohms, and XL is 100 ohms?
0
76 degrees with the voltage leading the current
0
14 degrees with the voltage leading the current
1
14 degrees with the voltage lagging the current
0
76 degrees with the voltage lagging the current
0

E5D10
What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 75 ohms, R is 100 ohms, and XL is 50 ohms?
0
76 degrees with the voltage lagging the current
0
14 degrees with the voltage leading the current
0
14 degrees with the voltage lagging the current
1
76 degrees with the voltage leading the current
0

E5D11
What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 250 ohms, R is 1 kilohm, and XL is 500 ohms?
0
81.47 degrees with the voltage lagging the current
0
81.47 degrees with the voltage leading the current
0
14.04 degrees with the voltage lagging the current
0
14.04 degrees with the voltage leading the current
1

E5E01
In polar coordinates, what is the impedance of a network comprised of a 100ohmreactance inductor in series with a 100ohm resistor?
0
121 ohms, /__35_degrees__
0
141 ohms, /__45_degrees__
1
161 ohms, /__55_degrees__
0
181 ohms, /__65_degrees__
0

E5E02
In polar coordinates, what is the impedance of a network comprised of a 100ohmreactance inductor, a 100ohmreactance capacitor, and a 100ohm resistor all connected in series?
0
100 ohms, /__90_degrees__
0
10 ohms, /__0_degrees__
0
10 ohms, /__100_degrees__
0
100 ohms, /__0_degrees__
1

E5E03
In polar coordinates, what is the impedance of a network comprised of a 300ohmreactance capacitor, a 600ohmreactance inductor, and a 400ohm resistor, all connected in series?
0
500 ohms, /__37_degrees__
1
400 ohms, /__27_degrees__
0
300 ohms, /__17_degrees__
0
200 ohms, /__10_degrees__
0

E5E04
In polar coordinates, what is the impedance of a network comprised of a 400ohmreactance capacitor in series with a 300ohm resistor?
0
240 ohms, /__36.9_degrees__
0
240 ohms, /__36.9_degrees__
0
500 ohms, /__53.1_degrees__
0
500 ohms, /__53.1_degrees__
1

E5E05
In polar coordinates, what is the impedance of a network comprised of a 400ohmreactance inductor in parallel with a 300ohm resistor?
0
240 ohms, /__36.9_degrees__
1
240 ohms, /__36.9_degrees__
0
500 ohms, /__53.1_degrees__
0
500 ohms, /__53.1_degrees__
0

E5E06
In polar coordinates, what is the impedance of a network comprised of a 100ohmreactance capacitor in series with a 100ohm resistor?
0
121 ohms, /__25_degrees__
0
191 ohms, /__85_degrees__
0
161 ohms, /__65_degrees__
0
141 ohms, /__45_degrees__
1

E5E07
In polar coordinates, what is the impedance of a network comprised of a 100ohmreactance capacitor in parallel with a 100ohm resistor?
0
31 ohms, /__15_degrees__
0
51 ohms, /__25_degrees__
0
71 ohms, /__45_degrees__
1
91 ohms, /__65_degrees__
0

E5E08
In polar coordinates, what is the impedance of a network comprised of a 300ohmreactance inductor in series with a 400ohm resistor?
0
400 ohms, /__27_degrees__
0
500 ohms, /__37_degrees__
1
500 ohms, /__47_degrees__
0
700 ohms, /__57_degrees__
0

E5E09
When using rectangular coordinates to graph the impedance of a circuit, what does the horizontal axis represent?
0
The voltage or current associated with the resistive component
1
The voltage or current associated with the reactive component
0
The sum of the reactive and resistive components
0
The difference between the resistive and reactive components
0

E5E10
When using rectangular coordinates to graph the impedance of a circuit, what does the vertical axis represent?
0
The voltage or current associated with the resistive component
0
The voltage or current associated with the reactive component
1
The sum of the reactive and resistive components
0
The difference between the resistive and reactive components
0

E5E11
What do the two numbers represent that are used to define a point on a graph using rectangular coordinates?
0
The horizontal and inverted axes
0
The vertical and inverted axes
0
The coordinate values along the horizontal and vertical axes
1
The phase angle with respect to its prime center
0

E5E12
If you plot the impedance of a circuit using the rectangular coordinate system and find the impedance point falls on the right side of the graph on the horizontal line, what do you know about the circuit?
0
It has to be a direct current circuit
0
It contains resistance and capacitive reactance
0
It contains resistance and inductive reactance
0
It is equivalent to a pure resistance
1

E5E13
Why would you plot the impedance of a circuit using the polar coordinate system?
0
To display the data on an XY chart
0
To give a visual representation of the phase angle
1
To graphically represent the DC component
0
To show the reactance which is present
0

E5E14
What coordinate system can be used to display the resistive, inductive, and/or capacitive reactance components of an impedance?
0
Maidenhead grid
0
National Bureau of Standards
0
Faraday
0
Rectangular
1

E5E15
What coordinate system can be used to display the phase angle of a circuit containing resistance, inductive and/or capacitive reactance?
0
Maidenhead grid
0
National Bureau of Standards
0
Faraday
0
Polar
1

E5E16
In polar coordinates, what is the impedance of a circuit of 100 j100 ohms impedance?
0
141 ohms, /__45_degrees__
1
100 ohms, /__45_degrees__
0
100 ohms, /__45_degrees__
0
141 ohms, /__45_degrees__
0

E5E17
In polar coordinates, what is the impedance of a circuit that has an admittance of 7.09 millisiemens at 45 degrees?
0
5.03 x 10(5) ohms, /__45_degrees__
0
141 ohms, /__45_degrees__
1
19,900 ohms, /__45_degrees__
0
141 ohms, /__45_degrees__
0

E5E18
In rectangular coordinates, what is the impedance of a circuit that has an admittance of 5 millisiemens at 30 degrees?
0
173  j100 ohms
0
200 + j100 ohms
0
173 + j100 ohms
1
200  j100 ohms
0

E5E19
In rectangular coordinates, what is the admittance of a circuit that has an impedance of 240 ohms at 36.9 degrees?
0
3.33 x 10(3)  j2.50 x 10(3) siemens
1
3.33 x 10(3) + j2.50 x 10(3) siemens
0
192 + j144 siemens
0
3.33  j2.50 siemens
0

E5E20
In polar coordinates, what is the impedance of a series circuit consisting of a resistance of 4 ohms, an inductive reactance of 4 ohms, and a capacitive reactance of 1 ohm?
0
6.4 ohms, /__53_degrees__
0
5 ohms, /__37_degrees__
1
5 ohms, /__45_degrees__
0
10 ohms, /__51_degrees__
0

E5E21
Which point on Figure E52 best represents the impedance of a series circuit consisting of a 400 ohm resistor and a 38 picofarad capacitor at 14 MHz?
0
Point 2
0
Point 4
1
Point 5
0
Point 6
0

E5E22
Which point in Figure E52 best represents the impedance of a series circuit consisting of a 300 ohm resistor and an 18 microhenry inductor at 3.505 MHz?
0
Point 1
0
Point 3
1
Point 7
0
Point 8
0

E5E23
Which point on Figure E52 best represents the impedance of a series circuit consisting of a 300 ohm resistor and a 19 picofarad capacitor at 21.200 MHz?
0
Point 1
1
Point 3
0
Point 7
0
Point 8
0

E5F01
What is the result of skin effect?
0
As frequency increases, RF current flows in a thinner layer of the conductor, closer to the surface
1
As frequency decreases, RF current flows in a thinner layer of the conductor, closer to the surface
0
Thermal effects on the surface of the conductor increase the impedance
0
Thermal effects on the surface of the conductor decrease the impedance
0

E5F02
What effect causes most of an RF current to flow along the surface of a conductor?
0
Layer effect
0
Seeburg effect
0
Skin effect
1
Resonance effect
0

E5F03
Where does almost all RF current flow in a conductor?
0
Along the surface of the conductor
1
In the center of the conductor
0
In a magnetic field around the conductor
0
In a magnetic field in the center of the conductor
0

E5F04
Why does most of an RF current flow near the surface of a conductor?
0
Because a conductor has AC resistance due to selfinductance
0
Because the RF resistance of a conductor is much less than the DC resistance
0
Because of the heating of the conductor's interior
0
Because of skin effect
1

E5F05
Why is the resistance of a conductor different for RF currents than for direct currents?
0
Because the insulation conducts current at high frequencies
0
Because of the Heisenburg Effect
0
Because of skin effect
1
Because conductors are nonlinear devices
0

E5F06
What device is used to store electrical energy in an electrostatic field?
0
A battery
0
A transformer
0
A capacitor
1
An inductor
0

E5F07
What unit measures electrical energy stored in an electrostatic field?
0
Coulomb
0
Joule
1
Watt
0
Volt
0

E5F08
What is a magnetic field?
0
Current through the space around a permanent magnet
0
The space through which a magnetic force acts
1
The space between the plates of a charged capacitor, through which a magnetic force acts
0
The force that drives current through a resistor
0

E5F09
In what direction is the magnetic field oriented about a conductor in relation to the direction of electron flow?
0
In the same direction as the current
0
In a direction opposite to the current
0
In all directions; omnidirectional
0
In a direction determined by the lefthand rule
1

E5F10
What determines the strength of a magnetic field around a conductor?
0
The resistance divided by the current
0
The ratio of the current to the resistance
0
The diameter of the conductor
0
The amount of current
1

E5F11
What is the term for energy that is stored in an electromagnetic or electrostatic field?
0
Amperesjoules
0
Potential energy
1
Joulescoulombs
0
Kinetic energy
0

E5G01
What is the Q of a parallel RLC circuit if the resonant frequency is 14.128 MHz, L is 2.7 microhenrys and R is 18 kilohms?
0
75.1
1
7.51
0
71.5
0
0.013
0

E5G02
What is the Q of a parallel RLC circuit if the resonant frequency is 4.468 MHz, L is 47 microhenrys and R is 180 ohms?
0
0.00735
0
7.35
0
0.136
1
13.3
0

E5G03
What is the Q of a parallel RLC circuit if the resonant frequency is 7.125 MHz, L is 8.2 microhenrys and R is 1 kilohm?
0
36.8
0
0.273
0
0.368
0
2.72
1

E5G04
What is the Q of a parallel RLC circuit if the resonant frequency is 7.125 MHz, L is 12.6 microhenrys and R is 22 kilohms?
0
22.1
0
39
1
25.6
0
0.0256
0

E5G05
What is the Q of a parallel RLC circuit if the resonant frequency is 3.625 MHz, L is 42 microhenrys and R is 220 ohms?
0
23
0
0.00435
0
4.35
0
0.23
1

E5G06
Why is a resistor often included in a parallel resonant circuit?
0
To increase the Q and decrease the skin effect
0
To decrease the Q and increase the resonant frequency
0
To decrease the Q and increase the bandwidth
1
To increase the Q and decrease the bandwidth
0

E5G07
What is the term for an outofphase, nonproductive power associated with inductors and capacitors?
0
Effective power
0
True power
0
Peak envelope power
0
Reactive power
1

E5G08
In a circuit that has both inductors and capacitors, what happens to reactive power?
0
It is dissipated as heat in the circuit
0
It goes back and forth between magnetic and electric fields, but is not dissipated
1
It is dissipated as kinetic energy in the circuit
0
It is dissipated in the formation of inductive and capacitive fields
0

E5G09
In a circuit where the AC voltage and current are out of phase, how can the true power be determined?
0
By multiplying the apparent power times the power factor
1
By subtracting the apparent power from the power factor
0
By dividing the apparent power by the power factor
0
By multiplying the RMS voltage times the RMS current
0

E5G10
What is the power factor of an RL circuit having a 60 degree phase angle between the voltage and the current?
0
1.414
0
0.866
0
0.5
1
1.73
0

E5G11
How many watts are consumed in a circuit having a power factor of 0.2 if the input is 100V AC at 4 amperes?
0
400 watts
0
80 watts
1
2000 watts
0
50 watts
0

E5G12
Why would the power used in a circuit be less than the product of the magnitudes of the AC voltage and current?
0
Because there is a phase angle greater than zero between the current and voltage
1
Because there are only resistances in the circuit
0
Because there are no reactances in the circuit
0
Because there is a phase angle equal to zero between the current and voltage
0

E5G13
What is the Q of a parallel RLC circuit if the resonant frequency is 14.128 MHz, L is 4.7 microhenrys and R is 18 kilohms?
0
4.31
0
43.1
1
13.3
0
0.023
0

E5G14
What is the Q of a parallel RLC circuit if the resonant frequency is 14.225 MHz, L is 3.5 microhenrys and R is 10 kilohms?
0
7.35
0
0.0319
0
71.5
0
31.9
1

E5G15
What is the Q of a parallel RLC circuit if the resonant frequency is 7.125 MHz, L is 10.1 microhenrys and R is 100 ohms?
0
0.221
1
4.52
0
0.00452
0
22.1
0

E5G16
What is the Q of a parallel RLC circuit if the resonant frequency is 3.625 MHz, L is 3 microhenrys and R is 2.2 kilohms?
0
0.031
0
32.2
1
31.1
0
25.6
0

E5H01
What is the effective radiated power of a repeater station with 50 watts transmitter power output, 4dB feed line loss, 2dB duplexer loss, 1dB circulator loss and 6dBd antenna gain?
0
199 watts
0
39.7 watts
1
45 watts
0
62.9 watts
0

E5H02
What is the effective radiated power of a repeater station with 50 watts transmitter power output, 5dB feed line loss, 3dB duplexer loss, 1dB circulator loss and 7dBd antenna gain?
0
79.2 watts
0
315 watts
0
31.5 watts
1
40.5 watts
0

E5H03
What is the effective radiated power of a station with 75 watts transmitter power output, 4dB feed line loss and 10dBd antenna gain?
0
600 watts
0
75 watts
0
150 watts
0
299 watts
1

E5H04
What is the effective radiated power of a repeater station with 75 watts transmitter power output, 5dB feed line loss, 3dB duplexer loss, 1dB circulator loss and 6dBd antenna gain?
0
37.6 watts
1
237 watts
0
150 watts
0
23.7 watts
0

E5H05
What is the effective radiated power of a station with 100 watts transmitter power output, 1dB feed line loss and 6dBd antenna gain?
0
350 watts
0
500 watts
0
20 watts
0
316 watts
1

E5H06
What is the effective radiated power of a repeater station with 100 watts transmitter power output, 5dB feed line loss, 3dB duplexer loss, 1dB circulator loss and 10dBd antenna gain?
0
794 watts
0
126 watts
1
79.4 watts
0
1260 watts
0

E5H07
What is the effective radiated power of a repeater station with 120 watts transmitter power output, 5dB feed line loss, 3dB duplexer loss, 1dB circulator loss and 6dBd antenna gain?
0
601 watts
0
240 watts
0
60 watts
1
79 watts
0

E5H08
What is the effective radiated power of a repeater station with 150 watts transmitter power output, 2dB feed line loss, 2.2dB duplexer loss and 7dBd antenna gain?
0
1977 watts
0
78.7 watts
0
420 watts
0
286 watts
1

E5H09
What is the effective radiated power of a repeater station with 200 watts transmitter power output, 4dB feed line loss, 3.2dB duplexer loss, 0.8dB circulator loss and 10dBd antenna gain?
0
317 watts
1
2000 watts
0
126 watts
0
300 watts
0

E5H10
What is the effective radiated power of a repeater station with 200 watts transmitter power output, 2dB feed line loss, 2.8dB duplexer loss, 1.2dB circulator loss and 7dBd antenna gain?
0
159 watts
0
252 watts
1
632 watts
0
63.2 watts
0

E5H11
What term describes station output (including the transmitter, antenna and everything in between), when considering transmitter power and system gains and losses?
0
Power factor
0
Halfpower bandwidth
0
Effective radiated power
1
Apparent power
0

E5H12
What is reactive power?
0
Wattless, nonproductive power
1
Power consumed in wire resistance in an inductor
0
Power lost because of capacitor leakage
0
Power consumed in circuit Q
0

E5H13
What is the power factor of an RL circuit having a 45 degree phase angle between the voltage and the current?
0
0.866
0
1.0
0
0.5
0
0.707
1

E5H14
What is the power factor of an RL circuit having a 30 degree phase angle between the voltage and the current?
0
1.73
0
0.5
0
0.866
1
0.577
0

E5H15
How many watts are consumed in a circuit having a power factor of 0.6 if the input is 200V AC at 5 amperes?
0
200 watts
0
1000 watts
0
1600 watts
0
600 watts
1

E5H16
How many watts are consumed in a circuit having a power factor of 0.71 if the apparent power is 500 watts?
0
704 W
0
355 W
1
252 W
0
1.42 mW
0

E5I01
What is photoconductivity?
0
The conversion of photon energy to electromotive energy
0
The increased conductivity of an illuminated semiconductor junction
1
The conversion of electromotive energy to photon energy
0
The decreased conductivity of an illuminated semiconductor junction
0

E5I02
What happens to the conductivity of a photoconductive material when light shines on it?
0
It increases
1
It decreases
0
It stays the same
0
It becomes unstable
0

E5I03
What happens to the resistance of a photoconductive material when light shines on it?
0
It increases
0
It becomes unstable
0
It stays the same
0
It decreases
1

E5I04
What happens to the conductivity of a semiconductor junction when light shines on it?
0
It stays the same
0
It becomes unstable
0
It increases
1
It decreases
0

E5I05
What is an optocoupler?
0
A resistor and a capacitor
0
A frequency modulated heliumneon laser
0
An amplitude modulated heliumneon laser
0
An LED and a phototransistor
1

E5I06
What is an optoisolator?
0
An LED and a phototransistor
1
A PN junction that develops an excess positive charge when exposed to light
0
An LED and a capacitor
0
An LED and a solar cell
0

E5I07
What is an optical shaft encoder?
0
An array of neon or LED indicators whose light transmission path is controlled by a rotating wheel
0
An array of optocouplers whose light transmission path is controlled by a rotating wheel
1
An array of neon or LED indicators mounted on a rotating wheel in a coded pattern
0
An array of optocouplers mounted on a rotating wheel in a coded pattern
0

E5I08
What characteristic of a crystalline solid will photoconductivity change?
0
The capacitance
0
The inductance
0
The specific gravity
0
The resistance
1

E5I09
Which material will exhibit the greatest photoconductive effect when visible light shines on it?
0
Potassium nitrate
0
Lead sulfide
0
Cadmium sulfide
1
Sodium chloride
0

E5I10
Which material will exhibit the greatest photoconductive effect when infrared light shines on it?
0
Potassium nitrate
0
Lead sulfide
1
Cadmium sulfide
0
Sodium chloride
0

E5I11
Which material is affected the most by photoconductivity?
0
A crystalline semiconductor
1
An ordinary metal
0
A heavy metal
0
A liquid semiconductor
0

E5I12
What characteristic of optoisolators is often used in power supplies?
0
They have low impedance between the light source and the phototransistor
0
They have very high impedance between the light source and the phototransistor
1
They have low impedance between the light source and the LED
0
They have very high impedance between the light source and the LED
0

E5I13
What characteristic of optoisolators makes them suitable for use with a triac to form the solidstate equivalent of a mechanical relay for a 120 V AC household circuit?
0
Optoisolators provide a low impedance link between a control circuit and a power circuit
0
Optoisolators provide impedance matching between the control circuit and power circuit
0
Optoisolators provide a very high degree of electrical isolation between a control circuit and a power circuit
1
Optoisolators eliminate (isolate) the effects of reflected light in the control circuit
0