Q. In a forward-biased diode, what happens to the barrier potential?
-
A.
It increases
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B.
It decreases
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C.
It remains constant
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D.
It reverses
Solution
In a forward-biased diode, the applied voltage reduces the barrier potential, allowing current to flow.
Correct Answer:
B
— It decreases
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Q. What happens to a diode when it is reverse-biased?
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A.
It conducts current freely
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B.
It blocks current flow
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C.
It generates heat
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D.
It amplifies the signal
Solution
When a diode is reverse-biased, it blocks current flow, preventing it from conducting until the breakdown voltage is reached.
Correct Answer:
B
— It blocks current flow
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Q. What is the input impedance characteristic of a FET?
-
A.
Low input impedance
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B.
High input impedance
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C.
Variable input impedance
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D.
Zero input impedance
Solution
FETs are known for their high input impedance, which makes them suitable for use in high-impedance applications.
Correct Answer:
B
— High input impedance
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Q. What is the main characteristic of a Schottky diode?
-
A.
High reverse breakdown voltage
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B.
Low forward voltage drop
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C.
High current gain
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D.
Temperature stability
Solution
A Schottky diode is known for its low forward voltage drop, making it efficient for high-speed switching applications.
Correct Answer:
B
— Low forward voltage drop
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Q. What is the primary function of an operational amplifier (op-amp)?
-
A.
To rectify AC signals
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B.
To amplify voltage signals
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C.
To switch electronic signals
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D.
To store charge
Solution
The primary function of an operational amplifier is to amplify voltage signals, often used in various analog applications.
Correct Answer:
B
— To amplify voltage signals
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Q. What is the primary use of an operational amplifier (op-amp)?
-
A.
To rectify AC signals
-
B.
To amplify voltage signals
-
C.
To switch electronic devices
-
D.
To store charge
Solution
An operational amplifier (op-amp) is primarily used to amplify voltage signals in various electronic circuits.
Correct Answer:
B
— To amplify voltage signals
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Q. What is the purpose of a rectifier in electronic circuits?
-
A.
To amplify signals
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B.
To convert AC to DC
-
C.
To filter noise
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D.
To store energy
Solution
The primary purpose of a rectifier is to convert alternating current (AC) to direct current (DC).
Correct Answer:
B
— To convert AC to DC
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Q. What is the purpose of a small-signal model in electronics?
-
A.
To analyze large signal behavior
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B.
To simplify the analysis of linear circuits
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C.
To design power amplifiers
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D.
To measure frequency response
Solution
A small-signal model is used to simplify the analysis of linear circuits by approximating the behavior of components around a bias point.
Correct Answer:
B
— To simplify the analysis of linear circuits
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Q. What is the typical forward voltage drop of a silicon diode?
-
A.
0.2V
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B.
0.7V
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C.
1.5V
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D.
2.0V
Solution
The typical forward voltage drop of a silicon diode is approximately 0.7V when it is conducting.
Correct Answer:
B
— 0.7V
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Q. Which type of diode is used for voltage regulation?
-
A.
Zener diode
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B.
Schottky diode
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C.
Light-emitting diode
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D.
Photodiode
Solution
A Zener diode is specifically designed to operate in reverse bias and maintain a constant voltage.
Correct Answer:
A
— Zener diode
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