Q. In a rectifier circuit, what is the purpose of a filter capacitor?
-
A.
To increase the output voltage
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B.
To smooth out the rectified output
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C.
To decrease the current flow
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D.
To convert AC to DC
Solution
The filter capacitor in a rectifier circuit smooths out the rectified output by reducing voltage ripple.
Correct Answer:
B
— To smooth out the rectified output
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Q. What is the function of a Schmitt trigger?
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A.
To amplify weak signals
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B.
To provide hysteresis in signal processing
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C.
To rectify AC signals
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D.
To store binary data
Solution
A Schmitt trigger is used to provide hysteresis in signal processing, ensuring clean transitions between high and low states.
Correct Answer:
B
— To provide hysteresis in signal processing
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Q. What is the function of a small-signal model in electronics?
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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
Small-signal models are used to simplify the analysis of linear circuits by approximating the behavior around a bias point.
Correct Answer:
B
— To simplify the analysis of linear circuits
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Q. What is the main characteristic of a Zener diode?
-
A.
It can amplify signals
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B.
It allows current to flow in both directions
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C.
It maintains a constant voltage across it
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D.
It is used for switching applications
Solution
Zener diodes are designed to maintain a constant voltage across them when reverse-biased, making them useful for voltage regulation.
Correct Answer:
C
— It maintains a constant voltage across it
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Q. What is the output state of a D flip-flop when the clock signal transitions from low to high?
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A.
It holds the previous state
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B.
It resets to zero
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C.
It takes the value of the D input
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D.
It toggles its state
Solution
A D flip-flop captures the value of the D input on the rising edge of the clock signal and holds that value until the next clock transition.
Correct Answer:
C
— It takes the value of the D input
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Q. What is the output state of a JK flip-flop when both J and K inputs are high?
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A.
Set state
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B.
Reset state
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C.
Toggle state
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D.
No change
Solution
When both J and K inputs are high, the JK flip-flop toggles its output state.
Correct Answer:
C
— Toggle state
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Q. What is the primary characteristic of a rectifier?
-
A.
It converts AC to DC
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B.
It amplifies signals
-
C.
It stores energy
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D.
It regulates voltage
Solution
Rectifiers are designed to convert alternating current (AC) into direct current (DC).
Correct Answer:
A
— It converts AC to DC
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Q. What is the primary function of a timer in electronic circuits?
-
A.
To amplify signals
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B.
To measure time intervals
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C.
To rectify AC signals
-
D.
To store data
Solution
Timers are used in electronic circuits to measure time intervals and generate precise timing signals.
Correct Answer:
B
— To measure time intervals
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Q. What is the primary purpose of an operational amplifier (op-amp)?
-
A.
To convert AC to DC
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B.
To amplify voltage signals
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C.
To rectify current
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D.
To switch electronic signals
Solution
Operational amplifiers are designed to amplify voltage signals, making them fundamental components in analog circuits.
Correct Answer:
B
— To amplify voltage signals
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Q. What is the primary use of a timer in electronic circuits?
-
A.
To amplify signals
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B.
To measure resistance
-
C.
To generate time delays
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D.
To rectify AC signals
Solution
Timers are used in circuits to generate precise time delays or to create timing sequences.
Correct Answer:
C
— To generate time delays
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Q. Which flip-flop is known for its ability to store a single bit of data?
-
A.
SR Flip-Flop
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B.
JK Flip-Flop
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C.
D Flip-Flop
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D.
T Flip-Flop
Solution
The D Flip-Flop is designed to store a single bit of data, capturing the input value on the clock edge.
Correct Answer:
C
— D Flip-Flop
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Q. Which timer IC is commonly used for generating precise time delays?
-
A.
555 Timer
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B.
LM317
-
C.
LM358
-
D.
CD4017
Solution
The 555 Timer IC is widely used for generating precise time delays and oscillations in various applications.
Correct Answer:
A
— 555 Timer
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Q. Which type of flip-flop is used to store a single bit of data?
-
A.
SR Flip-Flop
-
B.
JK Flip-Flop
-
C.
D Flip-Flop
-
D.
T Flip-Flop
Solution
The D Flip-Flop is specifically designed to store a single bit of data, capturing the input value on a clock edge.
Correct Answer:
C
— D Flip-Flop
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