# 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

Q2. A relay is ……….. switch

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

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

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

Q4. The most inexpensive switch is ………….. switch

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

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

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

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

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

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

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

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

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

Q10. ………………. multivibrator is a square wave oscillator

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

Q11. An astable multivibrator has ………….

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

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

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

Q14. A bistable multivibrator has …………..

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

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

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

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

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

Q19. A monostable vibrator has …………..

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

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

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

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

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

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

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

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

Q25. One would find a clamping circuit in ………………..

1. Receiving antenna

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

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)

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

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