75 lines
2.7 KiB
Markdown
75 lines
2.7 KiB
Markdown
G6A – Resistors; capacitors; inductors; rectifiers; solid-state diodes and transistors; vacuum tubes; batteries
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- [[G6A01]] (C)
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What is the minimum allowable discharge voltage for maximum life of a standard 12-volt lead-acid battery? #card
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- A. 6 volts
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- B. 8.5 volts
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- C. 10.5 volts
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- D. 12 volts
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- [[G6A02]] (B)
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What is an advantage of batteries with low internal resistance? #card
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- A. Long life
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- B. High discharge current
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- C. High voltage
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- D. Rapid recharge
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- [[G6A03]] (B)
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What is the approximate forward threshold voltage of a germanium diode? #card
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- A. 0.1 volt
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- B. 0.3 volts
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- C. 0.7 volts
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- D. 1.0 volts
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- [[G6A04]] (C)
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Which of the following is characteristic of an electrolytic capacitor? #card
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- A. Tight tolerance
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- B. Much less leakage than any other type
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- C. High capacitance for a given volume
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- D. Inexpensive RF capacitor
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- [[G6A05]] (C)
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What is the approximate forward threshold voltage of a silicon junction diode? #card
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- A. 0.1 volt
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- B. 0.3 volts
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- C. 0.7 volts
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- D. 1.0 volts
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- [[G6A06]] (B)
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Why should wire-wound resistors not be used in RF circuits? #card
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- A. The resistor’s tolerance value would not be adequate
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- B. The resistor’s inductance could make circuit performance unpredictable
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- C. The resistor could overheat
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- D. The resistor’s internal capacitance would detune the circuit
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- [[G6A07]] (A)
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What are the operating points for a bipolar transistor used as a switch? #card
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- A. Saturation and cutoff
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- B. The active region (between cutoff and saturation)
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- C. Peak and valley current points
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- D. Enhancement and depletion modes
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- [[G6A08]] (D)
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Which of the following is characteristic of low voltage ceramic capacitors? #card
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- A. Tight tolerance
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- B. High stability
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- C. High capacitance for given volume
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- D. Comparatively low cost
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- [[G6A09]] (B)
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Which of the following describes MOSFET construction? #card
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- A. The gate is formed by a back-biased junction
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- B. The gate is separated from the channel by a thin insulating layer
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- C. The source is separated from the drain by a thin insulating layer
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- D. The source is formed by depositing metal on silicon
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- [[G6A10]] (A)
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Which element of a vacuum tube regulates the flow of electrons between cathode and plate? #card
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- A. Control grid
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- B. Suppressor grid
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- C. Screen grid
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- D. Trigger electrode
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- [[G6A11]] (C)
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What happens when an inductor is operated above its self-resonant frequency? #card
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- A. Its reactance increases
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- B. Harmonics are generated
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- C. It becomes capacitive
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- D. Catastrophic failure is likely
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- [[G6A12]] (A)
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What is the primary purpose of a screen grid in a vacuum tube? #card
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- A. To reduce grid-to-plate capacitance
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- B. To increase efficiency
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- C. To increase the control grid resistance
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- D. To decrease plate resistance
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