Q. In a common-source FET configuration, what is the output taken from?
A.
Source terminal
B.
Gate terminal
C.
Drain terminal
D.
Body terminal
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Solution
In a common-source FET configuration, the output is taken from the drain terminal.
Correct Answer:
C
— Drain terminal
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Q. In a PN junction diode, what happens when the diode is forward-biased?
A.
The depletion region widens
B.
The diode blocks current
C.
Current flows easily through the diode
D.
The diode becomes an insulator
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Solution
When a PN junction diode is forward-biased, the depletion region narrows, allowing current to flow easily.
Correct Answer:
C
— Current flows easily through the diode
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Q. What does the small-signal model of a diode help analyze?
A.
High-frequency response
B.
DC biasing conditions
C.
Small variations around an operating point
D.
Thermal stability
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Solution
The small-signal model of a diode is used to analyze small variations around an operating point.
Correct Answer:
C
— Small variations around an operating point
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Q. What is the effect of temperature on the forward voltage drop of a diode?
A.
It increases
B.
It decreases
C.
It remains constant
D.
It becomes zero
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Solution
As temperature increases, the forward voltage drop of a diode typically decreases.
Correct Answer:
B
— It decreases
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Q. What is the function of a rectifier in a power supply?
A.
To convert AC to DC
B.
To amplify signals
C.
To filter noise
D.
To regulate voltage
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Solution
A rectifier's primary function is to convert alternating current (AC) to direct current (DC).
Correct Answer:
A
— To convert AC to DC
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Q. What is the main characteristic of a BJT in the active region?
A.
It acts as a switch
B.
It can amplify current
C.
It has high input impedance
D.
It is always in saturation
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Solution
In the active region, a BJT can amplify current, making it useful in amplification applications.
Correct Answer:
B
— It can amplify current
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Q. What is the primary function of an operational amplifier?
A.
To rectify AC signals
B.
To amplify voltage signals
C.
To switch electronic devices
D.
To store energy
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Solution
The primary function of an operational amplifier is to amplify voltage signals.
Correct Answer:
B
— To amplify voltage signals
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Q. What is the small-signal model used for in transistor circuits?
A.
To analyze large signal behavior
B.
To simplify the analysis of AC signals
C.
To determine thermal stability
D.
To calculate power dissipation
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Solution
The small-signal model is used to simplify the analysis of AC signals in transistor circuits.
Correct Answer:
B
— To simplify the analysis of AC signals
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Q. Which type of transistor is commonly used for switching applications?
A.
BJT
B.
FET
C.
MOSFET
D.
All of the above
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Solution
All types of transistors, including BJTs, FETs, and MOSFETs, can be used for switching applications, but MOSFETs are particularly popular due to their efficiency.
Correct Answer:
D
— All of the above
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