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ARRL Ham Radio License - Technician Class > Electronic and Electrical Components > Flashcards

Electronic and Electrical Components Flashcards

1
Q

What electrical component opposes the flow of current in a DC circuit?
A. Inductor
B. Resistor
C. Inverter
D. Transformer

A

B. Resistor

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2
Q

What type of component is often used as an adjustable volume control?
A. Fixed resistor
B. Power resistor
C. Potentiometer
D. Transformer

A

C. Potentiometer

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3
Q

What electrical parameter is controlled by a potentiometer?
A. Inductance
B. Resistance
C. Capacitance
D. Field strength

A

B. Resistance

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4
Q

What electrical component stores energy in an electric field?
A. Varistor
B. Capacitor
C. Inductor
D. Diode

A

B. Capacitor

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5
Q

What type of electrical component consists of conductive surfaces separated by an insulator?
A. Resistor
B. Potentiometer
C. Oscillator
D. Capacitor

A

D. Capacitor

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6
Q

What type of electrical component stores energy in a magnetic field?
A. Varistor
B. Capacitor
C. Inductor
D. Diode

A

C. Inductor

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7
Q

What electrical component is typically constructed as a coil of wire?
A. Switch
B. Capacitor
C. Diode
D. Inductor

A

D. Inductor

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8
Q

What is the function of an SPDT switch?
A. A single circuit is opened or closed
B. Two circuits are opened or closed
C. A single circuit is switched between one of two other circuits
D. Two circuits are each switched between one of two other circuits

A

C. A single circuit is switched between one of two other circuits

A Single Pole Double Throw (SPDT) switch is a switch that only has a single input and can connect to and switch between 2 outputs. This means it has one input terminal and two output terminals.

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9
Q

What electrical component is used to protect other circuit components from current overloads?
A. Fuse
B. Thyratron
C. Varactor
D. All these choices are correct

A

A. Fuse

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10
Q

Which of the following battery chemistries is rechargeable?
A. Nickel-metal hydride
B. Lithium-ion
C. Lead-acid
D. All these choices are correct

A

D. All these choices are correct

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11
Q

Which of the following battery chemistries is not rechargeable?
A. Nickel-cadmium
B. Carbon-zinc
C. Lead-acid
D. Lithium-ion

A

B. Carbon-zinc

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12
Q

What type of switch is represented by component 3 in figure T-2?
A. Single-pole single-throw
B. Single-pole double-throw
C. Double-pole single-throw
D. Double-pole double-throw

A

A. Single-pole single-throw

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13
Q

Which is true about forward voltage drop in a diode?
A. It is lower in some diode types than in others
B. It is proportional to peak inverse voltage
C. It indicates that the diode is defective
D. It has no impact on the voltage delivered to the load

A

A. It is lower in some diode types than in others

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14
Q

What electronic component allows current to flow in only one direction?
A. Resistor
B. Fuse
C. Diode
D. Driven element

A

C. Diode

A diode is a two-terminal electronic component that conducts current primarily in one direction (asymmetric conductance). It has low (ideally zero) resistance in one direction and high (ideally infinite) resistance in the other.

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15
Q

Which of these components can be used as an electronic switch?
A. Varistor
B. Potentiometer
C. Transistor
D. Thermistor

A

C. Transistor

A transistor is a semiconductor device used to amplify or switch electrical signals and power.

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16
Q

Which of the following components can consist of three regions of semiconductor material?
A. Alternator
B. Transistor
C. Triode
D. Pentagrid converter

A

B. Transistor

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17
Q

What type of transistor has a gate, drain, and source?
A. Varistor
B. Field-effect
C. Tesla-effect
D. Bipolar junction

A

B. Field-effect

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18
Q

How is the cathode lead of a semiconductor diode often marked on the package?
A. With the word “cathode”
B. With a stripe
C. With the letter C
D. With the letter K

A

B. With a stripe

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19
Q

What causes a light-emitting diode (LED) to emit light?
A. Forward current
B. Reverse current
C. Capacitively-coupled RF signal
D. Inductively-coupled RF signal

A

A. Forward current

20
Q

What does the abbreviation FET stand for?
A. Frequency Emission Transmitter
B. Fast Electron Transistor
C. Free Electron Transmitter
D. Field Effect Transistor

A

D. Field Effect Transistor

The field-effect transistor (FET) is a type of transistor that uses an electric field to control the flow of current in a semiconductor. It comes in two types: junction FET (JFET) and metal-oxide-semiconductor FET (MOSFET). FETs have three terminals: source, gate, and drain. FETs control the flow of current by the application of a voltage to the gate, which in turn alters the conductivity between the drain and source.

21
Q

What are the names for the electrodes of a diode?
A. Plus and minus
B. Source and drain
C. Anode and cathode
D. Gate and base

A

C. Anode and cathode

22
Q

Which of the following can provide power gain?
A. Transformer
B. Transistor
C. Reactor
D. Resistor

A

B. Transistor

A transistor is a semiconductor device used to amplify or switch electrical signals and power.

23
Q

What is the term that describes a device’s ability to amplify a signal?
A. Gain
B. Forward resistance
C. Forward voltage drop
D. On resistance

A

A. Gain

24
Q

What are the names of the electrodes of a bipolar junction transistor?
A. Signal, bias, power
B. Emitter, base, collector
C. Input, output, supply
D. Pole one, pole two, output

A

B. Emitter, base, collector

25
Q

What is the name of an electrical wiring diagram that uses standard component symbols?
A. Bill of materials
B. Connector pinout
C. Schematic
D. Flow chart

A

C. Schematic

26
Q

What is component 1 in figure T-1?
A. Resistor
B. Transistor
C. Battery
D. Connector

A

A. Resistor

A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element.

27
Q

What is component 2 in figure T-1?
A. Resistor
B. Transistor
C. Indicator lamp
D. Connector

A

B. Transistor

A transistor is a semiconductor device used to amplify or switch electrical signals and power. It is one of the basic building blocks of modern electronics.

28
Q

What is component 3 in figure T-1?
A. Resistor
B. Transistor
C. Lamp
D. Ground symbol

A

C. Lamp

29
Q

What is component 4 in figure T-1?
A. Resistor
B. Transistor
C. Ground symbol
D. Battery

A

D. Battery

30
Q

What is component 6 in figure T-2?
A. Resistor
B. Capacitor
C. Regulator IC
D. Transistor

A

B. Capacitor

31
Q

What is component 8 in figure T-2?
A. Resistor
B. Inductor
C. Regulator IC
D. Light emitting diode

A

D. Light emitting diode

32
Q

What is component 9 in figure T-2?
A. Variable capacitor
B. Variable inductor
C. Variable resistor
D. Variable transformer

A

C. Variable resistor

33
Q

What is component 4 in figure T-2?
A. Variable inductor
B. Double-pole switch
C. Potentiometer
D. Transformer

A

D. Transformer

34
Q

What is component 3 in figure T-3?
A. Connector
B. Meter
C. Variable capacitor
D. Variable inductor

A

D. Variable inductor

35
Q

What is component 4 in figure T-3?
A. Antenna
B. Transmitter
C. Dummy load
D. Ground

A

A. Antenna

36
Q

Which of the following is accurately represented in electrical schematics?
A. Wire lengths
B. Physical appearance of components
C. Component connections
D. All these choices are correct

A

C. Component connections

37
Q

Which of the following devices or circuits changes an alternating current into a varying direct current signal?
A. Transformer
B. Rectifier
C. Amplifier
D. Reflector

A

B. Rectifier

38
Q

What is a relay?
A. An electrically-controlled switch
B. A current controlled amplifier
C. An inverting amplifier
D. A pass transistor

A

A. An electrically-controlled switch

39
Q

Which of the following is a reason to use shielded wire?
A. To decrease the resistance of DC power connections
B. To increase the current carrying capability of the wire
C. To prevent coupling of unwanted signals to or from the wire
D. To couple the wire to other signals

A

C. To prevent coupling of unwanted signals to or from the wire

40
Q

Which of the following displays an electrical quantity as a numeric value?
A. Potentiometer
B. Transistor
C. Meter
D. Relay

A

C. Meter

41
Q

What type of circuit controls the amount of voltage from a power supply?
A. Regulator
B. Oscillator
C. Filter
D. Phase inverter

A

A. Regulator

42
Q

What component changes 120 V AC power to a lower AC voltage for other uses?
A. Variable capacitor
B. Transformer
C. Transistor
D. Diode

A

B. Transformer

43
Q

Which of the following is commonly used as a visual indicator?
A. LED
B. FET
C. Zener diode
D. Bipolar transistor

A

A. LED

44
Q

Which of the following is combined with an inductor to make a resonant circuit?
A. Resistor
B. Zener diode
C. Potentiometer
D. Capacitor

A

D. Capacitor

45
Q

What is the name of a device that combines several semiconductors and other components into one package?
A. Transducer
B. Multi-pole relay
C. Integrated circuit
D. Transformer

A

C. Integrated circuit

46
Q

What is the function of component 2 in figure T-1?
A. Give off light when current flows through it
B. Supply electrical energy
C. Control the flow of current
D. Convert electrical energy into radio waves

A

C. Control the flow of current

47
Q

Which of the following is a resonant or tuned circuit?
A. An inductor and a capacitor in series or parallel
B. A linear voltage regulator
C. A resistor circuit used for reducing standing wave ratio
D. A circuit designed to provide high-fidelity audio

A

A. An inductor and a capacitor in series or parallel

ARRL Ham Radio License - Technician Class (9 decks)

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