Q. In a common emitter BJT configuration, what is the phase relationship between the input and output signals?
-
A.
In phase
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B.
Out of phase
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C.
No phase relationship
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D.
Dependent on frequency
Solution
In a common emitter configuration, the output signal is inverted, meaning it is out of phase with the input.
Correct Answer:
B
— Out of phase
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Q. What is the function of an operational amplifier (op-amp) in arithmetic operations?
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A.
To perform addition and subtraction
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B.
To amplify signals only
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C.
To filter signals
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D.
To convert digital signals to analog
Solution
Op-amps can be configured to perform various arithmetic operations, including addition and subtraction.
Correct Answer:
A
— To perform addition and subtraction
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Q. What is the function of an operational amplifier in arithmetic operations?
-
A.
To perform addition and subtraction
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B.
To amplify signals only
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C.
To act as a voltage regulator
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D.
To convert AC to DC
Solution
Operational amplifiers can perform various arithmetic operations, including addition and subtraction.
Correct Answer:
A
— To perform addition and subtraction
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Q. What is the primary role of a rectifier in power supply circuits?
-
A.
To increase voltage
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B.
To convert AC to DC
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C.
To filter noise
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D.
To regulate current
Solution
The primary role of a rectifier is to convert alternating current (AC) into direct current (DC) for use in power supply circuits.
Correct Answer:
B
— To convert AC to DC
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Q. What is the typical configuration of a BJT used for signal amplification?
-
A.
Common base
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B.
Common collector
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C.
Common emitter
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D.
Common gate
Solution
The common emitter configuration is widely used for signal amplification due to its high gain.
Correct Answer:
C
— Common emitter
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Q. What type of rectifier uses both halves of the AC waveform?
-
A.
Half-wave rectifier
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B.
Full-wave rectifier
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C.
Bridge rectifier
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D.
Zener rectifier
Solution
A full-wave rectifier utilizes both halves of the AC waveform to produce a smoother DC output.
Correct Answer:
B
— Full-wave rectifier
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