Q. What is the function of a common-emitter configuration in a BJT?
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A.
To provide high input impedance
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B.
To provide voltage gain
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C.
To provide current gain only
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D.
To act as a switch
Solution
The common-emitter configuration provides voltage gain, making it a popular choice for amplification.
Correct Answer:
B
— To provide voltage gain
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Q. What is the primary role of a Zener diode?
-
A.
To amplify signals
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B.
To rectify AC signals
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C.
To provide voltage regulation
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D.
To switch circuits
Solution
Zener diodes are designed to allow current to flow in the reverse direction when a specific reverse voltage is reached, providing voltage regulation.
Correct Answer:
C
— To provide voltage regulation
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Q. Which logic gate is represented by a diode in series with a resistor?
-
A.
AND gate
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B.
OR gate
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C.
NAND gate
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D.
NOR gate
Solution
A diode in series with a resistor can represent an AND gate, as it allows current to flow only when both inputs are high.
Correct Answer:
A
— AND gate
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Q. Which of the following is a key feature of MOSFETs?
-
A.
They require a continuous current to operate
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B.
They have a gate that is insulated from the channel
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C.
They are always in saturation
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D.
They have low input impedance
Solution
MOSFETs have a gate that is insulated from the channel, allowing for very high input impedance and low power consumption.
Correct Answer:
B
— They have a gate that is insulated from the channel
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