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Ham General 2015-2019 > SUBELEMENT G6 – CIRCUIT COMPONENTS > Flashcards

SUBELEMENT G6 – CIRCUIT COMPONENTS Flashcards

1
Q

G6A01 (C)

What is the minimum allowable discharge voltage for maximum life of a standard 12 volt lead acid battery?

A

C. 10.5 volts

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2
Q

G6A02 (B)

What is an advantage of the low internal resistance of nickel-cadmium batteries?

A

B. High discharge current

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3
Q

G6A03 (B)

What is the approximate junction threshold voltage of a germanium diode?

A

B. 0.3 volts

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4
Q

G6A04 (D)

When is it acceptable to recharge a carbon-zinc primary cell?

A

D. Never

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5
Q

G6A05 (C)

What is the approximate junction threshold voltage of a conventional silicon diode?

A

C. 0.7 volts

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6
Q

G6A06 (A)
Which of the following is an advantage of using a Schottky diode in an RF switching circuit rather than a standard silicon diode?

A

A. Lower capacitance

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7
Q

G6A07 (A)

What are the stable operating points for a bipolar transistor used as a switch in a logic circuit?

A

A. Its saturation and cutoff regions

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8
Q

G6A08 (D)

Why must the cases of some large power transistors be insulated from ground?

A

D. To avoid shorting the collector or drain voltage to ground

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9
Q

G6A09 (B)

Which of the following describes the construction of a MOSFET?

A

B. The gate is separated from the channel with a thin insulating layer

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10
Q

G6A10 (A)

Which element of a triode vacuum tube is used to regulate the flow of electrons between cathode and plate?

A

A. Control grid

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11
Q

G6A11 (B)

Which of the following solid state devices is most like a vacuum tube in its general operating characteristics?

A

B. A field effect transistor

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12
Q

G6A12 (A)

What is the primary purpose of a screen grid in a vacuum tube?

A

A. To reduce grid-to-plate capacitance

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13
Q

G6A13 (D)

Why is the polarity of applied voltages important for polarized capacitors?

A

A. Incorrect polarity can cause the capacitor to short-circuit
B. Reverse voltages can destroy the dielectric layer of an electrolytic capacitor
C. The capacitor could overheat and explode
D. All of these choices are correct

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14
Q

G6A14 (D)

Which of the following is an advantage of ceramic capacitors as compared to other types of capacitors?

A

D. Comparatively low cost

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15
Q

G6A15(C)

Which of the following is an advantage of an electrolytic capacitor?

A

C. High capacitance for a given volume

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16
Q

G6A16 (C)

What will happen to the resistance if the temperature of a resistor is increased?

A

C. It will change depending on the resistor’s temperature coefficient

17
Q

G6A17 (B)

Which of the following is a reason not to use wire-wound resistors in an RF circuit?

A

B. The resistor’s inductance could make circuit performance unpredictable

18
Q

G6A18 (D)

What is an advantage of using a ferrite core toroidal inductor?

A

A. Large values of inductance may be obtained
B. The magnetic properties of the core may be optimized for a specific range of frequencies
C. Most of the magnetic field is contained in the core
D. All of these choices are correct

19
Q

G6A19 (C)

How should the winding axes of two solenoid inductors be oriented to minimize their mutual inductance?

A

C. At right angles to each other

20
Q

G6B01 (D)

Which of the following is an analog integrated circuit?

A

D. Linear voltage regulator

21
Q

G6B02 (B)

What is meant by the term MMIC?

A

B. Monolithic Microwave Integrated Circuit

22
Q

G6B03 (A)

Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?

A

A. Low power consumption

23
Q

G6B04 (B)

What is meant by the term ROM?

A

B. Read Only Memory

24
Q

G6B05 (C)

What is meant when memory is characterized as non-volatile?

A

C. The stored information is maintained even if power is removed

25
Q

G6B06 (D)

What kind of device is an integrated circuit operational amplifier?

A

D. Analog

26
Q

G6B07 (D)

Which of the following is an advantage of an LED indicator compared to an incandescent indicator?

A

A. Lower power consumption
B. Faster response time
C. Longer life
D. All of these choices are correct

27
Q

G6B08 (D)

How is an LED biased when emitting light?

A

D. Forward Biased

28
Q

G6B09 (A)

Which of the following is a characteristic of a liquid crystal display?

A

A. It requires ambient or back lighting

29
Q

G6B10 (A)

What two devices in an Amateur Radio station might be connected using a USB interface?

A

A. Computer and transceiver

30
Q

G6B11 (B)

What is a microprocessor?

A

B. A computer on a single integrated circuit

31
Q

G6B12 (D)

Which of the following connectors would be a good choice for a serial data port?

A

D. DE-9

32
Q

G6B13 (C)

Which of these connector types is commonly used for RF connections at frequencies up to 150 MHz?

A

C. PL-259

33
Q

G6B14 (C)

Which of these connector types is commonly used for audio signals in Amateur Radio stations?

A

C. RCA Phono

34
Q

G6B15 (B)

What is the main reason to use keyed connectors instead of non-keyed types?

A

B. Reduced chance of incorrect mating

35
Q

G6B16 (A)

Which of the following describes a type N connector?

A

A. A moisture-resistant RF connector useful to 10 GHz

36
Q

G6B17 (C)

What is the general description of a DIN type connector?

A

C. A family of multiple circuit connectors suitable for audio and control signals

37
Q

G6B18 (B)

What is a type SMA connector?

A

B. A small threaded connector suitable for signals up to several GHz

Ham General 2015-2019 (10 decks)

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