Q. What is the function of a diode bridge?
-
A.
To amplify signals
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B.
To convert AC to DC
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C.
To regulate voltage
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D.
To filter signals
Solution
A diode bridge is used to convert alternating current (AC) to direct current (DC) by allowing both halves of the AC waveform to be used.
Correct Answer:
B
— To convert AC to DC
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Q. What is the main advantage of using a Schottky diode?
-
A.
Higher reverse voltage
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B.
Lower forward voltage drop
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C.
Higher current rating
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D.
Better thermal stability
Solution
Schottky diodes have a lower forward voltage drop compared to standard diodes, making them efficient for high-speed applications.
Correct Answer:
B
— Lower forward voltage drop
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Q. What is the primary application of an operational amplifier (op-amp) in circuits?
-
A.
Signal amplification
-
B.
Rectification
-
C.
Voltage regulation
-
D.
Current limiting
Solution
Operational amplifiers are primarily used for signal amplification in various electronic circuits.
Correct Answer:
A
— Signal amplification
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Q. What is the primary use of an operational amplifier (op-amp) in circuits?
-
A.
To act as a switch
-
B.
To amplify voltage signals
-
C.
To rectify AC signals
-
D.
To store charge
Solution
Operational amplifiers are primarily used to amplify voltage signals in various applications.
Correct Answer:
B
— To amplify voltage signals
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Q. What is the purpose of a rectifier in a power supply?
-
A.
To increase voltage
-
B.
To convert AC to DC
-
C.
To filter noise
-
D.
To amplify signals
Solution
Rectifiers are used to convert alternating current (AC) to direct current (DC) in power supply circuits.
Correct Answer:
B
— To convert AC to DC
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Q. Which of the following is a characteristic of a FET?
-
A.
Current-controlled device
-
B.
Voltage-controlled device
-
C.
Requires biasing for operation
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D.
Has a high input current
Solution
FETs (Field Effect Transistors) are voltage-controlled devices, which means they control current flow based on the voltage applied to the gate.
Correct Answer:
B
— Voltage-controlled device
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Q. Which type of diode is specifically designed for voltage regulation?
-
A.
Zener diode
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B.
Schottky diode
-
C.
Light Emitting Diode (LED)
-
D.
Rectifier diode
Solution
Zener diodes are used for voltage regulation due to their ability to maintain a constant output voltage.
Correct Answer:
A
— Zener diode
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