electrical engineering MCQs – Page 349

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 Review each marked answer and report any item that may be outdated or unclear.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
6961. In a tansistor, IC = 100 mA and IE = 100.2 mA. The value of is____________?
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A. 50

B. 200

C. 100

D. about 1

6962. IC = [a / (1 a )] IB +_____________?
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A. ICEO

B. (1 a ) IB

C. ICBO

D. IC

6963. The collector of a transistor is____________doped?
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A. heavily

B. lightly

C. moderately

D. none of the above

6964. In a transistor, signal is transferred from a___________circuit?
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A. high resistance to low resistance

B. low resistance to high resistance

C. high resistance to high resistance

D. low resistance to low resistance

6965. The leakage current in CE arrangement is____________that in CB arrangement?
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A. less than

B. none of the above

C. the same as

D. more than
6966. A heat sink is generally used with a transistor to______________?
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A. compensate for excessive doping

B. decrease the forward current

C. prevent excessive temperature rise

D. increase the forward current

6967. The output impedance of a transistor is____________?
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A. low

B. high

C. zero

D. very low

6968. The power gain in a transistor connected in___________arrangement is the highest?
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A. common collector

B. common base

C. common emitter

D. none of the above

6969. The phase difference between the input and output voltages of a transistor connected in common emitter arrangement is___________?
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A. 180o

B. 0o

C. 90o

D. 270o

6970. The voltage gain in a transistor connected in___________arrangement is the highest?
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A. common base

B. common emitter

C. common collector

D. none of the above

6971. A transistor is connected in CB mode. If it is not connected in CE mode with same bias voltages, the values of IE, IB and IC will____________?
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A. remain the same

B. decrease

C. none of the above

D. increase

6972. The phase difference between the input and output voltages in a common base arrangement is___________?
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A. 90o

B. 180o

C. 0o

D. 270o

6973. The output impedance of a transistor connected in_____________arrangement is the highest?
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A. common collector

B. common base

C. common emitter

D. none of the above

6974. The value of a of a transistor is_____________?
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A. 1

B. less than 1

C. more than 1

D. none of the above

6975. If the value of a is 0.9, then value of is___________?
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A. 9

B. 900

C. 0.9

D. 90
6976. The input impedance of a transistor is___________?
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A. low

B. very high

C. almost zero

D. high

6977. In a transistor, the base current is about_________of emitter current?
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A. 25%

B. 35%

C. 5%

D. 20%

6978. IC = [a / (1 a )] IB + [___________ / (1 a )?
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A. IE

B. ICBO

C. ICEO

D. IC

6979. In a transistor if = 100 and collector current is 10 mA, then IE is___________?
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A. 100 mA

B. 110 mA

C. none of the above

D. 100.1 mA
6980. The arrow in the symbol of a transistor indicates the direction of____________?
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A. hole current in the emitter

B. electron current in the collector

C. electron current in the emitter

D. donor ion current