electrical engineering MCQs – Page 137

Practise multiple-choice questions from electrical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

electrical engineering Mcqs

1. economics of power generation 2. analog electronics 3. solid state switching circuits 4. parallel circuits 5. switchgear and protection 6. op amp circuits 7. transistor audio power amplifiers 8. electrostatics 9. heating and welding 10. multi stage transistor amplifiers 11. passive filters 12. network theorems 13. regulated d c power supply 14. a c fundamentals circuits and circuit theory 15. electromagnetic induction 16. power electronics 17. magnetism and electromagnetism 18. transformers 19. modulation and demodulation 20. d c generators 21. semiconductor theory 22. single phase induction motors 23. semiconductor diode 24. hybrid parameters 25. digital electronics 26. oscillators 27. earthing or grounding 28. single stage transistor amplifiers 29. d c motors 30. transistor biasing 31. amplifiers with negative feedback 32. basic electrical 33. electronic instruments 34. synchronous motors 35. field effect transistors fet 36. magnetic circuit 37. control systems 38. industrial drives 39. power generation 40. series parallel circuits 41. transistor tuned amplifiers 42. electrical engineering materials 43. rectifiers and converters 44. integrated circuits 45. scr silicon controlled rectifiers 46. cables 47. polyphase induction motors 48. measurement and instrumentation 49. transistors 50. electrical machine design 51. electrolysis and storage of batteries 52. electric traction 53. transmission and distribution

2721. When a transistor is driven to cut off, ideally the output is _______________?
0

A. VCC

B. VCC/3

C. VCC/2

D. 0

2722. Aluminium when adopted as a conductor material in __________ transformers, decreases the overall cost of the transformer?
0

A. any of the above size

B. large size

C. small size

D. medium size

2723. The active components in an IC are _______________?
0

A. Capacitors

B. Transistors and diodes

C. Resistors

D. None of the above

2724. Which of the following is most difficult to fabricate in an IC ?
0

A. Diode

B. FET

C. Capacitor

D. Transistor

2725. A practical formula for determining the thickness of insulation between low voltage and high voltage windings is__________________?
0

A. 4 + 0.7 kV mm

B. 5 + 0.9 kV mm

C. 1 + 0.2 kVmm

D. 2 + 0.5 kVmm

2726. For an integrating circuit to be effective , the RC product should be____________ the time period of the input wave?
0

A. 5 times greater than

B. At least 10 times greater than

C. Equal to

D. 5 times smaller than

2727. For large power transformers, self oil cooled type or air blast type which of the following values of current density may be used?
0

A. 3.2 to 4.2 A/mm2

B. 1.0 to 1.2 A/mm2

C. 1.5 to 2.0 A/mm2

D. 2.2 to 3.2 A/mm2

2728. If the reverse bias on the gate of a JFET is increased, then width of the conducting channel ______________?
0

A. is increased

B. remains the same

C. is decreased

D. none of the above

2729. A JFET is similar in operation to ___________ valve?
0

A. diode

B. pentode

C. tetrode

D. triode

2730. A power supply which has voltage regulation of ____________ is unregulated power supply?
0

A. 5%

B. 8%

C. 10 %

D. 0%

2731. Zener diode can be used as__________________?
0

A. c. voltage regulator only

B. c. voltage regulator only

C. both D.C and A.C voltage regulator

D. none of the above

2732. An astable multivibrator has ________________?
0

A. One stable state

B. No stable state

C. None of the above

D. Two stable states

2733. A transistor takes_____________ inductor on a silicon IC chip?
0

A. More space than

B. None of the above

C. Less space than

D. Same space as

2734. An audio amplifier is an example of _________________?
0

A. Digital IC

B. Linear IC

C. Both digital and linear IC

D. None of the above

2735. If the input a.c. voltage to regulated or ordinary power supply increases by 5% what will be the approximate change in d.c. output voltage?
0

A. 10%

B. 20%

C. 15%

D. 5%

2736. If the gate of a JFET is made less negative, the width of the conducting channel__________________?
0

A. is increased

B. none of the above

C. is decreased

D. remains the same

2737. A Zener voltage regulator is used for ____________ load currents?
0

A. High

B. Moderate

C. Small

D. Very high

2738. A Zener voltage regulator will cease to act as a voltage regulator if Zener current becomes______________?
0

A. Zero

B. Less than load current

C. More than load current

D. None of the above

2739. ______________ multivibrator is a square wave oscillator?
0

A. Monostable

B. Astable

C. Bistable

D. None of the above

2740. In a p-channel JFET, the charge carriers are _____________?
0

A. electrons

B. holes

C. both electrons and holes

D. none of the above

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