Q. In a half-wave rectifier, what happens to the negative half of the AC signal?
-
A.
It is amplified
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B.
It is blocked
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C.
It is inverted
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D.
It is passed through
Solution
In a half-wave rectifier, the negative half of the AC signal is blocked by the diode.
Correct Answer:
B
— It is blocked
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Q. What does FET stand for?
-
A.
Field Effect Transistor
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B.
Frequency Emission Transistor
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C.
Fast Electronic Transistor
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D.
Floating Electrode Transistor
Solution
FET stands for Field Effect Transistor, which uses an electric field to control current.
Correct Answer:
A
— Field Effect Transistor
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Q. What is the input impedance of an ideal op-amp?
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A.
Zero
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B.
Finite
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C.
Infinite
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D.
Depends on the configuration
Solution
An ideal op-amp has infinite input impedance, which means it draws no current from the input source.
Correct Answer:
C
— Infinite
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Q. What is the primary function of a rectifier?
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A.
To convert DC to AC
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B.
To convert AC to DC
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C.
To amplify signals
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D.
To filter noise
Solution
A rectifier's primary function 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 primary use of an operational amplifier?
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A.
To rectify AC signals
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B.
To amplify voltage signals
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C.
To switch electronic devices
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D.
To store data
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 small-signal model used for in electronics?
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A.
To analyze large signals
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B.
To simplify circuit analysis for small variations
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C.
To design power supplies
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D.
To measure frequency response
Solution
The small-signal model simplifies circuit analysis for small variations around a bias point.
Correct Answer:
B
— To simplify circuit analysis for small variations
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