EE AND ECE IMPORTANT MCQ PDF-Solid State Switching Circuits 1

Q1. A switch has ………………

1. One state
2. Two states
3. Three states
4. None of the above

Answer : 2
Q2. A relay is ……….. switch

1. A mechanical
2. An electronic
3. An electromechanical
4. None of the above

Answer : 3
Q3. The switch that has the fastest speed of operation is ………….. switch

1. Electronic
2. Mechanical
3. Electromechanical
4. None of the above

Answer : 1
Q4. The most inexpensive switch is ………….. switch

1. Electronic
2. Mechanical
3. Electromechanical
4. None of the above

Answer : 1
Q5. The main disadvantage of a mechanical switch is that it………….

1. Is operated mechanically
2. Is costly
3. Has high inertia
4. None of the above

Answer : 3
Q6. When a transistor is driven to saturation, ideally the output is ………………

1. VCC
2. 0
3. VCC/2
4. 2VCC

Answer : 2
Q7. The maximum speed of electronic switch can be ………….. operations per second

1. 104
2. 10
3. 1000
4. 109

Answer : 4
Q8. A relay is superior to a mechanical switch because it ……………

1. Is relatively inexpensive
2. Does not require moving contacts
3. Combines control with power amplification
4. None of the above

Answer : 3
Q9. When a transistor is driven to cut off, ideally the output is …………..

1. VCC
2. 0
3. VCC/2
4. VCC/3

Answer : 1
Q10. ………………. multivibrator is a square wave oscillator

1. Monostable
2. Astable
3. Bistable
4. None of the above

Answer : 2
Q11. An astable multivibrator has ………….

1. One stable state
2. Two stable states
3. No stable state
4. None of the above

Answer : 3
Q12. If d.c. supply of 10 V is fed to a differentiating circuit, then output will be …….

1. 20 V
2. 10 V
3. 0 V
4. None of the above

Answer : 3
Q13. If the input to a differentiating circuit is a saw-tooth wave, then output will be ………….

1. Square
2. Triangular
3. Sine
4. Rectangular

Answer : 4
Q14. A bistable multivibrator has …………..

1. Two stable states
2. One stable state
3. No stable state
4. None of the above

Answer : 1
Q15. If a square wave is fed to a differentiating circuit, the output will be …………

1. Sine wave
2. Sharp narrow pulses
3. Rectangular wave
4. Triangular wave

Answer : 2
Q16. An integrating circuit is a simple RC series circuit with output taken across ………

1. Both R and C
2. R
3. C
4. None of the above

Answer : 3
Q17. For an integrating circuit to be effective , the RC product should be ………. the time period of the input wave

1. 5 times greater than
2. 5 times smaller than
3. Equal to
4. At least 10 times greater than

Answer : 4
Q18. A differentiating circuit is a simple RC circuit with output taken across …………..

1. R
2. C
3. Both R and C
4. None of the above

Answer : 1
Q19. A monostable vibrator has …………..

1. No stable state
2. One stable state
3. Two stable states
4. None of the above

Answer : 2
Q20. The multivibrator which generates square wave of its own is the ………… multivibrator

1. Monostable
2. Bistable
3. Astable
4. None of the above

Answer : 3
Q21. For a differentiating circuit to be effective, the RC product should be ………… the time period of the input wave

1. Equal to
2. 5 times greater than
3. 5 times smaller than
4. At least 10 times greater than

Answer : 4
Q22. When a rectangular voltage waveform is applied to a capacitor, then the current waveform is ……………

1. Rectangular
2. Sinusoidal
3. Sawtooth
4. Square

Answer : 1
Q23. The positive clipper is that which removes the …………………. half-cycles of the input voltage.

1. Negative
2. Positive
3. Both positive and negative
4. None of the above

Answer : 2
Q24. A clamping circuits adds ………………… component to the signal

1. dc.
2. ac.
3. both d.c. and a.c.
4. none of the above

Answer : 1
Q25. One would find a clamping circuit in ………………..

1. Receiving antenna
2. Radio transmitter
3. Radio receiver
4. Television receiver

Answer : 4
Q26. When a transistor is used as an amplifier, it is operated in the ……………… region

1. Off
2. Saturation
3. Active
4. None of the above

Answer : 3
Q27. When the transistor (CE arrangement) is in the cut off region, the collector current is ……………..

1. ICBO
2. ICEO
3. (β + 1) ICEO
4. IC(sat)

Answer : 2
Q28. A negative clipper removes the ……………… half-cycles of the input voltage

1. Negative
2. Positive
3. Both positive and negative
4. None of the above

Answer : 1
Q29. 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

1. Rectangular
2. Triangular
3. Sine
4. Square

Answer : 4
Q30. In a multivibrator, we have ………. feedback.

1. Negative
2. 100 % positive
3. Both positive and negative
4. None of the above

Answer : 2
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