Solid State Switching Circuits MCQs with Explanations
Practice high-yield Electrical Engineering MCQs on Solid State Switching Circuits with worked academic solutions for WAPDA, NTDC, IESCO, LESCO, PPSC, FPSC.
Questions
29
Difficulty Level
Exam-Level
Target Exams
WAPDA, NTDC, IESCO...
Estimated Time
35 mins
Exam-Level WAPDA NTDC IESCO LESCO PPSC FPSC
Verified for Commission Syllabus β’ Oct 14, 2026
29
Verified Practice Questions
Interactive test mode with detailed academic worked solutions
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π Set complete! All 29 questions answered.
Question 1 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
If the input to an integrating circuit is a succession of alternating positive and negative pulses of very short duration, the output will be ___________ wave
Correct Answer: Option D β Square
Detailed Academic Explanation:
Square is the correct answer to βIf the input to an integrating circuit is a succession of alternating positive and negative pulses of very short duration, the output will be ___________ waveβ. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 2 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
An integrating circuit is a simple RC series circuit with output taken across
Correct Answer: Option C β C
Detailed Academic Explanation:
C is the correct answer to βAn integrating circuit is a simple RC series circuit with output taken acrossβ. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 3 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
If the input to a differentiating circuit is a saw-tooth wave, then output will be ___________.
Correct Answer: Option D β Rectangular
Detailed Academic Explanation:
Rectangular is the correct answer to βIf the input to a differentiating circuit is a saw-tooth wave, then output will be ___________.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 4 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
If a square wave is fed to a differentiating circuit, the output will be ___________.
Correct Answer: Option B β Sharp narrow pulses
Detailed Academic Explanation:
Sharp narrow pulses is the correct answer to βIf a square wave is fed to a differentiating circuit, the output will be ___________.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 5 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
The multivibrator which generates square wave of its own is the ___________ multivibrator
Correct Answer: Option C β Astable
Detailed Academic Explanation:
Astable is the correct answer to βThe multivibrator which generates square wave of its own is the ___________ multivibratorβ. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 6 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
In a multivibrator, we have ___________ feedback.
Correct Answer: Option B β 100 % positive
Detailed Academic Explanation:
100 % positive is the correct answer to βIn a multivibrator, we have ___________ feedback.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 7 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
An astable multivibrator has ___________.
Correct Answer: Option C β No stable state
Detailed Academic Explanation:
No stable state is the correct answer to βAn astable multivibrator has ___________.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 8 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
A bistable multivibrator has ___________.
Correct Answer: Option A β Two stable states
Detailed Academic Explanation:
Two stable states is the correct answer to βA bistable multivibrator has ___________.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 9 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
A monostable vibrator has ___________.
Correct Answer: Option B β One stable state
Detailed Academic Explanation:
One stable state is the correct answer to βA monostable vibrator has ___________.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 10 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
A relay is superior to a mechanical switch because it ___________.
Correct Answer: Option C β Combines control with power amplification
Detailed Academic Explanation:
Combines control with power amplification is the correct answer to βA relay is superior to a mechanical switch because it ___________.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 11 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
When a transistor is used as an amplifier, it is operated in the ___________ region
Correct Answer: Option C β Active
Detailed Academic Explanation:
Active is the correct answer to βWhen a transistor is used as an amplifier, it is operated in the ___________ regionβ. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 12 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
When a rectangular voltage waveform is applied to a capacitor, then the current waveform is ___________.
Correct Answer: Option A β Rectangular
Detailed Academic Explanation:
Rectangular is the correct answer to βWhen a rectangular voltage waveform is applied to a capacitor, then the current waveform is ___________.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 13 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
The positive clipper is that which removes the ___________ half-cycles of the input voltage.
Correct Answer: Option B β Positive
Detailed Academic Explanation:
Positive is the correct answer to βThe positive clipper is that which removes the ___________ half-cycles of the input voltage.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 14 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
If d.c. supply of 10 V is fed to a differentiating circuit, then output will be .
Correct Answer: Option C β 0 V
Detailed Academic Explanation:
0 V is the correct answer to βIf d.c. supply of 10 V is fed to a differentiating circuit, then output will be .β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 15 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
A switch has ___________.
Correct Answer: Option B β Two states
Detailed Academic Explanation:
Two states is the correct answer to βA switch has ___________.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 16 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
A differentiating circuit is a simple RC circuit with output taken across ___________.
Correct Answer: Option A β R
Detailed Academic Explanation:
R is the correct answer to βA differentiating circuit is a simple RC circuit with output taken across ___________.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 17 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
For an integrating circuit to be effective , the RC product should be ___________ the time period of the input wave.
Correct Answer: Option D β At least 10 times greater than
Detailed Academic Explanation:
At least 10 times greater than is the correct answer to βFor an integrating circuit to be effective , the RC product should be ___________ the time period of the input wave.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 18 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
For a differentiating circuit to be effective, the RC product should be ___________ the time period of the input wave.
Correct Answer: Option D β At least 10 times greater than
Detailed Academic Explanation:
At least 10 times greater than is the correct answer to βFor a differentiating circuit to be effective, the RC product should be ___________ the time period of the input wave.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 19 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
A negative clipper removes the ___________ half-cycles of the input voltage.
Correct Answer: Option A β Negative
Detailed Academic Explanation:
Negative is the correct answer to βA negative clipper removes the ___________ half-cycles of the input voltage.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 20 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
The maximum speed of electronic switch can be ___________ operations per second.
Correct Answer: Option D β 109
Detailed Academic Explanation:
109 is the correct answer to βThe maximum speed of electronic switch can be ___________ operations per second.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 21 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
One would find a clamping circuit in ___________.
Correct Answer: Option D β Television receiver
Detailed Academic Explanation:
Television receiver is the correct answer to βOne would find a clamping circuit in ___________.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 22 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
When the transistor (CE arrangement) is in the cut off region, the collector current is ___________.
Correct Answer: Option B β ICEO
Detailed Academic Explanation:
ICEO is the correct answer to βWhen the transistor (CE arrangement) is in the cut off region, the collector current is ___________.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 23 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
A relay is ___________ switch.
Correct Answer: Option C β An electromechanical
Detailed Academic Explanation:
An electromechanical is the correct answer to βA relay is ___________ switch.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 24 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
The switch that has the fastest speed of operation is ___________ switch.
Correct Answer: Option A β Electronic
Detailed Academic Explanation:
Electronic is the correct answer to βThe switch that has the fastest speed of operation is ___________ switch.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 25 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
The most inexpensive switch is ___________ switch.
Correct Answer: Option A β Electronic
Detailed Academic Explanation:
Electronic is the correct answer to βThe most inexpensive switch is ___________ switch.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 26 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
The main disadvantage of a mechanical switch is that it___________.
Correct Answer: Option C β Has high inertia
Detailed Academic Explanation:
Has high inertia is the correct answer to βThe main disadvantage of a mechanical switch is that it___________.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 27 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
___________ multivibrator is a square wave oscillator.
Correct Answer: Option B β Astable
Detailed Academic Explanation:
Astable is the correct answer to β___________ multivibrator is a square wave oscillator.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 28 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
When a transistor is driven to saturation, ideally the output is ___________.
Correct Answer: Option B β 0
Detailed Academic Explanation:
0 is the correct answer to βWhen a transistor is driven to saturation, ideally the output is ___________.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
Question 29 of 29
β WAPDA
β NTDC
β WAPDA
β NTDC
When a transistor is driven to cut off, ideally the output is ___________.
Correct Answer: Option A β VCC
Detailed Academic Explanation:
VCC is the correct answer to βWhen a transistor is driven to cut off, ideally the output is ___________.β. This question is standard in competitive examination syllabi for Solid State Switching Circuits.
π‘Key Conceptual Anchor:Solid State Switching Circuits
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A_C Fundamentals_ Circuits And Circuit Theory β Part 1
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π‘Examiner's Advisory for Electrical Engineering
In competitive commission exams (FPSC, PPSC, KPPSC, SPSC, CSS, PMS), questions are frequently phrased with distractor options designed to catch rote learners. Whenever you answer an MCQ, read the Detailed Academic Explanation and Conceptual Anchor to understand why the remaining options are incorrect.