Q. What is the function of a capacitor in a rectifier circuit?
-
A.
To increase current
-
B.
To filter out noise
-
C.
To store charge
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D.
To convert AC to DC
Solution
In a rectifier circuit, a capacitor is used to store charge and smooth out the output voltage.
Correct Answer:
C
— To store charge
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Q. What is the main advantage of using FETs over BJTs?
-
A.
Higher current gain
-
B.
Lower input impedance
-
C.
Higher input impedance
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D.
Lower power consumption
Solution
FETs have a higher input impedance compared to BJTs, making them suitable for high-impedance applications.
Correct Answer:
C
— Higher input impedance
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Q. What is the main characteristic of a common-emitter BJT configuration?
-
A.
High input impedance
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B.
Inverted output
-
C.
Low voltage gain
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D.
No phase shift
Solution
The common-emitter configuration provides an inverted output, meaning the output signal is 180 degrees out of phase with the input.
Correct Answer:
B
— Inverted output
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Q. What is the primary function of a Zener diode?
-
A.
To rectify AC signals
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B.
To allow current to flow in one direction
-
C.
To regulate voltage
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D.
To amplify signals
Solution
A Zener diode is specifically designed to regulate voltage by allowing current to flow in the reverse direction when a certain voltage is reached.
Correct Answer:
C
— To regulate voltage
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Q. What is the purpose of an operational amplifier (op-amp) in a circuit?
-
A.
To convert AC to DC
-
B.
To amplify voltage signals
-
C.
To act as a switch
-
D.
To store charge
Solution
An operational amplifier is 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 an operational amplifier (op-amp)?
-
A.
To convert AC to DC
-
B.
To amplify voltage signals
-
C.
To rectify signals
-
D.
To switch circuits
Solution
An operational amplifier is primarily used to amplify voltage signals in various applications.
Correct Answer:
B
— To amplify voltage signals
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Q. Which of the following is a characteristic of MOSFETs?
-
A.
They are current-controlled devices
-
B.
They have high input impedance
-
C.
They require a biasing current
-
D.
They are less sensitive to temperature changes
Solution
MOSFETs are known for their high input impedance, making them suitable for various applications.
Correct Answer:
B
— They have high input impedance
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