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4/20/2012
1
Technician Licensing ClassTechnician Licensing Class
Supplement T6
Electrical/Electronic ComponentsElectrical/Electronic Components
4 Exam Questions, 4 Groups
Amateur Radio Technician ClassEl t 2 C P t tiElement 2 Course Presentation
ELEMENT 2 SUB-ELEMENTS
– T1 - FCC Rules, descriptions and definitions for the amateur radio service, operator and station license responsibilities.T2 – Operating Procedures– T2 – Operating Procedures
– T3 – Radio wave characteristics, radio and electromagnetic properties, propagation modes
– T4 – Amateur radio practices and station set up– T5 – Electrical principles, math for electronics, electronic principles,T5 Electrical principles, math for electronics, electronic principles,
Ohm’s LawT6 – Electrical components, semiconductors, circuit diagrams, component functions
– T7 – Station equipment, common transmitter and receiver problems, t t d t bl h ti b i i d t tiantenna measurements and troubleshooting, basic repair and testing
– T8 – Modulation modes, amateur satellite operation, operating activities, non-voice communications
– T9 – Antennas, feedlines– T0 – AC power circuits antenna installation RF hazards
2
– T0 – AC power circuits, antenna installation, RF hazards
T6A: Electrical components; fixed and variable resistors, capacitors, and inductors; fuses, switches, batteriescapacitors, and inductors; fuses, switches, batteries
– T6A1 A resistor is the electrical component used to oppose the flow of current in a DC circuit.
– T6A2 The potentiometer is the type of component often used as an adjustable volume control.
Schematic Symbol
– T6A3 Resistance is the electrical parameter controlled by a potentiometer.
Schematic Symbol
3
pote t o ete
T6A: Electrical components; fixed and variable resistors, capacitors and inductors; fuses switches batteriescapacitors, and inductors; fuses, switches, batteries
T6A4 A capacitor is the electrical component that stores energy in an l t i fi ldelectric field.
Typical construction and schematic symbol for capacitors.
Various fixed capacitors
44
T6A: Electrical components; fixed and variable resistors, capacitors and inductors; fuses switches batteriescapacitors, and inductors; fuses, switches, batteries
– T6A5 The capacitor is the type of electrical component consisting of two or more conductive surfaces separated by an insulator.
» Paper, mica, air…
An ind ctor is the t pe of electrical component that stores– T6A6 An inductor is the type of electrical component that stores energy in a magnetic field.
– T6A7 The inductor is an electrical component usually composed of a coil of wire.
Schematic Symbol
55
T6A: Electrical components; fixed and variable resistors, capacitors, and inductors; fuses, switches, batteriesp , ; , ,
– T6A8 A switch is an electrical component that is used to connect or di t l t i l i itdisconnect electrical circuits.
Toggle Switch Slide Switch Rocker Switch
Schematic Symbol
– T6A9 A fuse is an electrical component used to protect other circuit components from current overloads.
Schematic Symbol
66
Slow Blow Fuse
Automobile Fuse
Schematic Symbol
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T6A: Electrical components; fixed and variable resistors, capacitors, and inductors; fuses, switches, batteriesp , ; , ,
– T6A10 1 2 volts is the nominal voltage of a fully charged nickel-T6A10 1.2 volts is the nominal voltage of a fully charged nickelcadmium cell.
Small and compact just like Ham Radio hand helds.
Ni-Cad rechargeable 1 25 volt batteries in a
Rubber duck antenna
T6A11 A carbon zinc battery type is not rechargeable
1.25 volt batteries in a marine hand held.
77
– T6A11 A carbon-zinc battery type is not rechargeable.
T6B: Semiconductors; basic principles of diodes and transistors
– T6B1 Transistors are a class of electronic components capable f fof using a voltage or current signal to control current flow.
Rows of Transistors
– T6B2 A diode is an electronic component that allows current to flow in only one direction.
– Rectification is process of changing AC to pulsating DC
– Diode stops current flow when it tries to go in the reverse direction
8
T6B: Semiconductors; basic principles of diodes and transistors
– T6B3 A transistor is a component that can be used as an electronic switch or amplifierswitch or amplifier.
The bi ola j ctio t a i to i a co o e t that i ade of
Small Signal Transistors Schematic Symbol
– T6B4 The bipolar junction transistor is a component that is made of three layers of semiconductor material.
9
T6B:Semiconductors; basic principles of diodes and transistors
– T6B5 The transistor is an electronic components that can amplify signals.
– T6B6 A semiconductor diode’s cathode lead is usually identified with a stripe.
T6B7 The abbreviation "LED" stands for Light Emitting Diode– T6B7 The abbreviation LED stands for Light Emitting Diode.
1010
T6B: Semiconductors; basic principles of diodes and transistors
– T6B8 The abbreviation "FET" stands for Field Effect Transistor.
– T6B9 Anode and cathode are the names of the two electrodes of a diode.
11Semiconductor Diode Zener Diode
T6B: Semiconductors; basic principles of diodes and transistors
– T6B10 The bipolar transistor semiconductor component has an emitter electrodeemitter electrode.
Emitter Electrode
Gate Electrode
– T6B11 The field effect transistor semiconductor component has a
Electrode
pgate electrode.
– T6B12 Gain is the term that describes a transistor's ability to amplify i l
12
a signal.
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T6C: Circuit diagrams; schematic symbols
– T6C1 Schematic symbols is the name for standardizedT6C1 Schematic symbols is the name for standardized representations of components in an electrical wiring diagram.
1313
T6C: Circuit diagrams; schematic symbols
T6C2 Component 1 in figure T1 is a resistorT6C2 Component 1 in figure T1 is a resistor.
33
12
41
2
4
Resistor
44
55Figure T1
1414
g
T6C: Circuit diagrams; schematic symbols
– T6C3 Component 2 in figure T1 is a transistor.
33
2
3
2
3Transistor
14
14 Figure T1
55
1515
T6C: Circuit diagrams; schematic symbols
– T6C4 Component 3 in figure T1 is a lampT6C4 Component 3 in figure T1 is a lamp.
Lamp
12
3
12
3
14
14
55 Figure T1
1616
T6C: Circuit diagrams; schematic symbols
– T6C5 Component 4 in figure T1 is a batteryT6C5 Component 4 in figure T1 is a battery.
2
3
2
3Battery
12
41
2
4
55Figure T1
1717
Figure T1
T6C: Circuit diagrams; schematic symbols
– T6C6 Component 6 in figure T2 is a capacitorT6C6 Component 6 in figure T2 is a capacitor.
2 53 92 53 95
4
7
95
4
7
9
16
7
8
101
6
7
8
10
Figure T2
Capacitor
1818
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4
T6C: Circuit diagrams; schematic symbols
– T6C7 Component 8 in figure T2 is a light emitting diodeT6C7 Component 8 in figure T2 is a light emitting diode.
2 53 92 53 95
4
7
95
4
7
9
16
7
8
101
6
7
8
10
Figure T2
1919
Light Emitting Diode
T6C: Circuit diagrams; schematic symbols
– T6C8 Component 9 in figure T2 is a variable resistorT6C8 Component 9 in figure T2 is a variable resistor.
2 53 92 53 9
Variable Resistor
5
4
7
95
4
7
9
16
7
8
101
6
7
8
10
Figure T2
2020
T6C: Circuit diagrams; schematic symbols
• T6C9 Component 4 in figure T2 is a transformer• T6C9 Component 4 in figure T2 is a transformer.
2 53 92 53 95
4
7
95
4
7
9
16
7
8
101
6
7
8
10
Figure T2
2121
Transformer
T6C: Circuit diagrams; schematic symbols
– T6C10 Component 3 in figure T3 is a variable inductorT6C10 Component 3 in figure T3 is a variable inductor.
44
1
2
1
2
1
3
1
333
Figure T3
Variable Inductor
2222
Figure T3
T6C: Circuit diagrams; schematic symbols
– T6C11 Component 4 in figure T3 is an antenna.
44 Antenna
1
2
1
2
1
3
1
333
Figure T3
2323
Figure T3
T6C: Circuit diagrams; schematic symbols
T6C12 The symbols on an– T6C12 The symbols on an electrical circuit schematic diagram represent electrical components.
– T6C13 The way electricalT6C13 The way electrical components are interconnected accurately represent electrical circuit schematic diagrams.
24
schematic diagrams.
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T6D: Component functions
– T6D1 Rectifier devices or circuits change an alternating current intoT6D1 Rectifier devices or circuits change an alternating current into a varying direct current signal.
Power supply contains: Transformer, rectifier (diodes), filter choke, capacitors, and regulators. (d odes), te c o e, capac to s, a d egu ato s
This circuitry converts the house 120 VAC to varying DC and that is filtered and smoothed out to produce DC current that we need for our ham radio equipment.
2525
q p
T6D: Component functions
T6D2 A switch controlled by an electromagnet best describes a relay.
Relays
ElectromagnetsElectromagnets
2626
T6D: Component functions
– T6D3 A single-pole single-throw switch is represented by item 3 inT6D3 A single pole single throw switch is represented by item 3 in figure T2.
2 53 92 53 9
Single-Pole Single-Throw Switch
5
4
7
95
4
7
9
16
7
8
101
6
7
8
10
Figure T2
2727
T6D: Component functions
– T6D4 A meter can be used to display signal strength on a numeric scale.
S MeterS-Meter
2828Icom 7700
T6D: Component functions
– T6D5 A regulator is a type of circuit that controls the g ypamount of voltage from a power supply.
Voltage Regulators
– T6D6 A transformer is a component commonly used to change 120V AC house current to a lower AC voltage for other uses.
– T6D7 An LED is commonly used as a visual indicator. Voltage Transformer
29An array of LEDs and resistors mounted on a printed circuit board
T6D: Component functions
– T6D8 A capacitor is used together with an inductor to make a tuned circuitcircuit.
Capacitor (variable)
Inductor
Tank Circuit or Tuned Circuit
Inductor
Tank Circuit Schematic
– T6D9 Integrated circuit is the name of a device that combines several semiconductors and other components into one package.
Tank Circuit or Tuned Circuit Tank Circuit Schematic
3030
several semiconductors and other components into one package.
Large-scale integrated circuit chip
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T6D: Component functions
– T6D10 To control the flow of current is the function of component 2 in Figure T1in Figure T1.
33Component 2
12
41
2
4
Figure T1
– T6D11 A common use of coaxial cable is to carry RF signals between a radio and antenna
55
3131
between a radio and antenna.
Element 2 Technician Class Question Pool
T6Electrical components, semiconductors, pcircuit diagrams, component functions
[4 Exam Questions – 4 Groups]
Valid July 1 2010Valid July 1, 2010
Through
June 30, 2014
T6A01 What electrical component is used to
oppose the flow of current in a DC circuit?ppA. InductorB. ResistorC. VoltmeterD. Transformer
33
T6A02 What type of component is often used as anT6A02 What type of component is often used as an adjustable volume control?
A. Fixed resistorB. Power resistorC. PotentiometerD. Transformer
34
T6A03 What electrical parameter is controlled byT6A03 What electrical parameter is controlled by a potentiometer?
A. InductanceB. ResistanceC. CapacitanceD. Field strengthg
35
T6A04 What electrical component stores energyT6A04 What electrical component stores energy in an electric field?
A. ResistorB. CapacitorpC. InductorD. Diode
36
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T6A05 What type of electrical component consistsT6A05 What type of electrical component consists of two or more conductive surfaces
separated by an insulator?
A. ResistorB. PotentiometerC. OscillatorD. Capacitorp
37
T6A06 What type of electrical component storesT6A06 What type of electrical component stores energy in a magnetic field?
A. ResistorB. CapacitorpC. InductorD. Diode
38
T6A07 What electrical component is usuallyT6A07 What electrical component is usually composed of a coil of wire?
A. SwitchB. CapacitorpC. DiodeD. Inductor
39
T6A08 What electrical component is used to pconnect or disconnect electrical circuits?
A. Zener diodeB. SwitchC. InductorD. Variable resistor
40
T6A09 What electrical component is used toT6A09 What electrical component is used to protect other circuit components from
current overloads?
A. FuseB. CapacitorpC. ShieldD. Inductor
41
T6A10 What is the nominal voltage of a fullyT6A10 What is the nominal voltage of a fully charged nickel-cadmium cell?
A. 1.0 voltsB. 1.2 voltsC. 1.5 voltsD. 2.2 volts
42
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T6A11 Which battery type is not rechargeable?
A. Nickel-cadmiumB Carbon-zincB. Carbon zincC. Lead-acidD Lithi iD. Lithium-ion
43
T6B01 What class of electronic components isT6B01 What class of electronic components is capable of using a voltage or current
signal to control current flow?
A. CapacitorsB. InductorsC. ResistorsD. Transistors
44
T6B02 What electronic component allows current pto flow in only one direction?
A. ResistorB. FuseC. DiodeD. Driven element
45
T6B03 Which of these components can be used asT6B03 Which of these components can be used as an electronic switch or amplifier?
A. OscillatorB. PotentiometerC. TransistorD. Voltmeter
46
T6B04 Which of these components is made of pthree layers of semiconductor material?
A. AlternatorB. Bipolar junction transistorp jC. TriodeD. Pentagrid converterg
47
T6B05 Which of the following electronicT6B05 Which of the following electronic components can amplify signals?
A. TransistorB. Variable resistorC. Electrolytic capacitorD. Multi-cell batteryy
48
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T6B06 How is a semiconductor diode’s cathodeT6B06 How is a semiconductor diode s cathode lead usually identified?
A. With the word “cathode”B. With a stripepC. With the letter “C”D. All of these choices are correct
49
T6B07 What does the abbreviation "LED" standT6B07 What does the abbreviation LED stand for?
A. Low Emission DiodeB. Light Emitting Diodeg gC. Liquid Emission DetectorD. Long Echo Delayg y
50
T6B08 What does the abbreviation "FET" standT6B08 What does the abbreviation FET stand for?
A. Field Effect TransistorB. Fast Electron TransistorC. Free Electron TransitionD. Field Emission Thickness
51
T6B09 What are the names of the two electrodesT6B09 What are the names of the two electrodes of a diode?
A. Plus and minusB. Source and drainC. Anode and cathodeD. Gate and base
52
T6B10 Which semiconductor component has anT6B10 Which semiconductor component has an emitter electrode?
A. Bipolar transistorB. Field effect transistorC. Silicon diodeD. Bridge rectifierg
53
T6B11 Which semiconductor component has aT6B11 Which semiconductor component has a gate electrode?
A. Bipolar transistorB. Field effect transistorC. Silicon diodeD. Bridge rectifierg
54
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10
T6B12 What is the term that describes aT6B12 What is the term that describes a transistor's ability to amplify a signal?
A. GainB. Forward resistanceC. Forward voltage dropD. On resistance
55
T6C01 What is the name for standardizedT6C01 What is the name for standardized representations of components in an
electrical wiring diagram?
A. Electrical depictionsB. Grey sketchyC. Schematic symbolsD. Component calloutsp
56
T6C02 What is component 1 in figure T1?
A. ResistorB. TransistorC. BatteryD. connector
57
T6C03 What is component 2 in figure T1?
A. ResistorB. TransistorC. Indicator lampD. Connector
58
T6C04 What is component 3 in figure T1?
A. ResistorB. TransistorC. LampD. Ground symboly
59
T6C05 What is component 4 in figure T1?
A. ResistorB. TransistorC. BatteryD. Ground symboly
60
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T6C06 What is component 6 in figure T2?
A ResistorA. ResistorB. CapacitorC R l t ICC. Regulator ICD. Transistor
61
T6C07 What is component 8 in figure T2?
A ResistorA. ResistorB. InductorC Regulator ICC. Regulator ICD. Light emitting diode
62
T6C08 What is component 9 in figure T2?
A Variable capacitorA. Variable capacitorB. Variable inductorC Variable resistorC. Variable resistorD. Variable transformer
63
T6C09 What is component 4 in figure T2?
A. Variable inductorB. Double-pole switchC. PotentiometerC. PotentiometerD. Transformer
64
T6C10 What is component 3 in figure T3?
A. ConnectorB. MeterC. Variable capacitorD. Variable inductor
65
T6C11 What is component 4 in figure T3?
A. AntennaB. TransmitterC. Dummy loadD. Ground
66
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T6C12 What do the symbols on an electricalT6C12 What do the symbols on an electrical circuit schematic diagram represent?
A. Electrical componentsB. Logic statesgC. Digital codesD. Traffic nodes
67
T6C13 Which of the following is accuratelyT6C13 Which of the following is accurately represented in electrical circuit schematic
diagrams?
A. Wire lengthsB. Physical appearance of componentsC. The way components are interconnectedD. All of these choices
68
T6D01 Which of the following devices or circuitsT6D01 Which of the following devices or circuits changes an alternating current into a
varying direct current signal?
A. TransformerB. RectifierC. AmplifierD. Reflector
69
T6D02 What best describes a relay?T6D02 What best describes a relay?
A. A switch controlled by an electromagnetB. A current controlled amplifierpC. An optical sensorD. A pass transistorp
70
T6D03 What type of switch is represented by itemT6D03 What type of switch is represented by item 3 in figure T2?
A Single-pole single-throwA. Single pole single throwB. Single-pole double-throwC Double-pole single-throwC. Double-pole single-throwD. Double-pole double-throw
71
T6D04 Which of the following can be used to gdisplay signal strength on a numeric scale?
A. PotentiometerB. TransistorC. MeterD. Relayy
72
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T6D05 What type of circuit controls the amount ofT6D05 What type of circuit controls the amount of voltage from a power supply?
A. RegulatorB. OscillatorC. FilterD. Phase inverter
73
T6D06 What component is commonly used toT6D06 What component is commonly used to change 120V AC house current to a lower
AC voltage for other uses?
A. Variable capacitorB. TransformerC. TransistorD. Diode
74
T6D07 Which of the following is commonly usedT6D07 Which of the following is commonly used as a visual indicator?
A. LEDB. FETC. Zener diodeD. Bipolar transistorp
75
T6D08 Which of the following is used together withT6D08 Which of the following is used together with an inductor to make a tuned circuit?
A. ResistorB. Zener diodeC. PotentiometerD. Capacitorp
76
T6D09 What is the name of a device that combinesT6D09 What is the name of a device that combines several semiconductors and other
components into one package?
A. TransducerB. Multi-pole relayp yC. Integrated circuitD. Transformer
77
T6D10 What is the function of component 2 inT6D10 What is the function of component 2 in Figure T1?
A Give off light whenA. Give off light when current flows through it
B. Supply electricalB. Supply electrical energy
C. Control the flow of current
D. Convert electrical energy into radio waves
78
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14
T6D11 Which of the following is a common use f i l bl ?of coaxial cable?
A. Carry dc power from a vehicle battery to aA. Carry dc power from a vehicle battery to a mobile radio
B. Carry RF signals between a radio and y gantenna
C. Secure masts, tubing, and other cylindrical g yobjects on towers
D. Connect data signals from a TNC to a computer
79