electrical engineering MCQs – Page 111

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 Review each marked answer and report any item that may be outdated or unclear.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 generation2. analog electronics3. solid state switching circuits4. parallel circuits5. switchgear and protection6. op amp circuits7. transistor audio power amplifiers8. electrostatics9. heating and welding10. multi stage transistor amplifiers11. passive filters12. network theorems13. regulated d c power supply14. a c fundamentals circuits and circuit theory15. electromagnetic induction16. power electronics17. magnetism and electromagnetism18. transformers19. modulation and demodulation20. d c generators21. semiconductor theory22. single phase induction motors23. semiconductor diode24. hybrid parameters25. digital electronics26. oscillators27. earthing or grounding28. single stage transistor amplifiers29. d c motors30. transistor biasing31. amplifiers with negative feedback32. basic electrical33. electronic instruments34. synchronous motors35. field effect transistors fet36. magnetic circuit37. control systems38. industrial drives39. power generation40. series parallel circuits41. transistor tuned amplifiers42. electrical engineering materials43. rectifiers and converters44. integrated circuits45. scr silicon controlled rectifiers46. cables47. polyphase induction motors48. measurement and instrumentation49. transistors50. electrical machine design51. electrolysis and storage of batteries52. electric traction53. transmission and distribution
2201. The output impedance of a transistor connected in_____________arrangement is the highest?
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A. common base

B. common collector

C. common emitter

D. none of the above

2202. The size of the earth or ground wire is based on the______________?
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A. maximum fault current carrying through the ground wire

B. rated current carrying capacity of the service line

C. depends on the soil resistance

D. both (A) and (C)
2203. The output impedance of an emitter follower is______________?
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A. Almost zero

B. Low

C. Very high

D. High

2204. Six resistors are in parallel. The two lowest-value resistors are both 1.2 k?. The total resistance______________?
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A. is greater than 1.2 k?

B. is less than 600 ?

C. is less than 6 k?

D. is less than 1.2 k?

2205. If the doping level in a crystal diode is increased, the width of depletion layer_____________?
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A. in increased

B. none of the above

C. remains the same

D. is decreased

2206. In a tansistor, IC = 100 mA and IE = 100.2 mA. The value of is____________?
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A. about 1

B. 200

C. 100

D. 50

2207. For intermittent work which of the following furnaces is suitable ?
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A. Either of the above

B. None of the above

C. Core less furnace

D. Indirect arc furnace

2208. A 1,000 V power supply would use_____________ as a filter capacitor?
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A. paper capacitor

B. mica capacitor

C. electrolytic capacitor

D. air capacitor

2209. If voltage feedback (negative) is applied to an amplifier, its output impedance ______________?
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A. Remains the same

B. Is decreased

C. Is increased

D. None of the above

2210. A sudden increase in the total current into a parallel circuit may indicate______________?
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A. either a drop in source voltage or an open resistor

B. a drop in source voltage

C. an open resistor

D. an increase in source voltage
2211. When negative voltage feedback is applied to an amplifier, its voltage gain ____________?
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A. Is reduced

B. Remains the same

C. Is increased

D. None of the above

2212. A crystal diode is a ________________device?
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A. linear

B. none of the above

C. non-linear

D. bilateral

2213. The dimensions of hie parameter are _______________?
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A. Mho

B. Ohm

C. None of the above

D. Farad

2214. When the crystal current diode current is large, the bias is ______________?
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A. poor

B. inverse

C. reverse

D. forward
2215. For the transmission of heat from one body to another__________?
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A. temperature of the two bodies must be different

B. both bodies must be solids

C. both bodies must be in contact

D. at least one of the bodies must have some source of heating

2216. Induction furnaces are employed for which of the following ?
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A. None of the above

B. Heat treatment of castings

C. Melting aluminium

D. Heating of insulators

2217. A zener diode utilizes ______________ characteristics for its operation?
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A. forward

B. reverse

C. both forward and reverse

D. none of the above

2218. If the operating point changes, the h parameters of transistor_____________?
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A. Also change

B. Do not change

C. None of the above

D. May or may not change

2219. An oscillator converts __________?
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A. power into a.c. power

B. mechanical power into a.c. power

C. none of the above

D. power into d.c. power

2220. A zener diode is used as ______________?
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A. an amplifier

B. a multivibrator

C. a rectifier

D. a voltage regulator