electrical engineering MCQs – Page 293

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 Review each marked answer and report any item that may be outdated or unclear.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
5841. Bulbs in street lighting are all connected in_____________?
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A. series

B. parallel

C. series-parallel

D. end-to-end

5842. are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators______________?
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A. Thermistor

B. Variable resistors

C. Semi-conductors

D. Varistors

5843. Switching of a lamp in house produces noise in the radio. This is because switching operation produces________?
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A. arcs across separating contacts

B. mechanical noise of high intensity

C. both mechanical noise and arc between contacts

D. none of the above

5844. For testing appliances, the wattage of test lamp should be_____________?
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A. any value

B. low

C. very low

D. high
5845. Which of the following can have negative temperature coefficient _____________?
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A. Metallic alloys

B. Liquid metals

C. Compounds of silver

D. Electrolytes
5846. A thermistor has_____________?
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A. zero temperature coefficient

B. positive temperature coefficient

C. negative temperature coefficient

D. variable temperature coefficient

5847. Whether circuit may be AC. or D. C. one, following is most effective in reducing the magnitude of the current?
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A. Capacitor

B. Resistor

C. Inductor

D. Reactor

5848. When one leg of parallel circuit is opened out the total current will______________?
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A. become zero

B. reduce

C. decrease

D. increase

5849. A nichrome wire used as a heater coil has the resistance of 2 2/m. For a heater of 1 kW at 200 V, the length of wire required will be_____________?
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A. 60 m

B. 80 m

C. 40 m

D. 20 m
5850. Voltage dependent resistors are used_____________?
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A. for inductive circuits

B. to supress surges

C. as heating elements

D. as current stabilizers

5851. 74. Sparking occurs when a load is switched off because the circuit has high_________?
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A. inductance

B. resistance

C. capacitance

D. impedance

5852. Resistance of a material always decreases if___________?
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A. number of free electrons available become more

B. temperature of material is decreased

C. temperature of material is increased

D. none of the above is correct

5853. Nichrome wire is an alloy of_____________?
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A. copper and silver

B. lead and zinc

C. nickel and chromium

D. chromium and vanadium

5854. Conductance : mho :: ____________?
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A. capacitance : henry

B. inductance : farad

C. resistance : ohm

D. lumen : steradian

5855. A glass rod when rubbed with silk cloth is charged because__________?
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A. it takes in proton

B. it gives away positive charge

C. its atoms are removed

D. it gives away electrons
5856. International ohm is defined in terms of the resistance of________________?
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A. the unit length of wire

B. a cube of copper

C. a cube of carbon

D. a column of mercury
5857. Two lamps 100 W and 40 W are connected in series across 230 V (alternating). Which of the following statement is correct ?
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A. 100 W lamp will glow brighter

B. 40 W lamp will glow brighter

C. Both lamps will glow equally bright

D. 40 W lamp will fuse

5858. A field of force can exist only between_____________?
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A. two metal particles

B. two molecules

C. two atoms

D. two ions
5859. The thickness of insulation provided on the conductor depends on_____________?
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A. the magnitude of voltage on the conductor

B. the magnitude of current flowing through it

C. both A. and (b)

D. none of the above

5860. A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb, the heater output will__________
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A. increase

B. remain same

C. decrease

D. heater will burn out