electrical engineering MCQs – Page 291

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 Review each marked answer and report any item that may be outdated or unclear.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
5801. Varistors are______________?
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A. resistors with zero temperature coefficient

B. carbon resistors

C. non-linear resistors

D. insulators

5802. A current of 16 amperes divides between two branches in parallel of resistances 8 ohms and 12 ohms respectively. The current in each branch is_____________?
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A. 4.6 A, 6.9 A

B. 6.4 A, 6.9 A

C. 4.6 A, 9.6 A

D. 6.4 A, 9.6 A
5803. Electric pressure is also called________?
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A. power

B. energy

C. voltage

D. resistance

5804. Which of the following statement is true both for a series and a parallel D. C. circuit?
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A. Currents are additive

B. Power are additive

C. Elements have individual currents

D. Voltages are additive

5805. Conductance is reciprocal of____________?
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A. reluctance

B. resistance

C. inductance

D. capacitance

5806. Inductor does not allow the sudden change of
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A. voltage

B. current

C. power

D. None of the above

5807. The hot resistance of the bulbs filament is higher than its cold resistance because the temperature co-efficient of the filament is___________________?
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A. positive

B. about 2 ohms per degree

C. zero

D. negative

5808. The rating of a fuse wire is always expressed in________________?
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A. kWh

B. ampere-hours

C. amperes

D. ampere-volts

5809. The resistivity of the conductor depends on
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A. type of material.

B. length of the conductor.

C. area of the conductor.

D. none of these.

5810. Which of the following material has nearly zero temperature co-efficient of resistance_________?
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A. Carbon

B. Copper

C. Porcelain

D. Manganin
5811. A resistance having rating 10 ohms, 10 W is likely to be a__________?
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A. variable resistor

B. wire wound resistor

C. metallic resistor

D. carbon resistor

5812. All of the following are equivalent to watt except_____________?
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A. joules/seC.

B. amperes x volts

C. amperes/volt

D. (amperes) ohm

5813. Which of the following statement is true________________?
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A. A galvanometer with low resistance in series is an ammeter

B. A galvanometer with high resistance in series is an ammeter

C. A galvanometer with low resistance in parallel is a voltmeter

D. A galvanometer with high resistance in parallel is a voltmeter

5814. Which one of the following does not have negative temperature co-efficient ____________?
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A. Rubber

B. Paper

C. Mica

D. Aluminium
5815. Four wires of same material, the same cross-sectional area and the same length when connected in parallel give a resistance of 25 Q. If the same four wires are connected is series the effective resistance will be________?
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A. 300 ?

B. 100 ?

C. 400 ?

D. 200 ?

5816. Which of the following are the passive elements?
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A. Bulb

B. None of these.

C. Both

D. Resistor

5817. A 3 Q resistor having 2 A current will dissipate the power of_______________?
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A. 12 watts

B. 2 watts

C. 4 watts

D. 6 watts

5818. Internal resistance of ideal voltage source is ?
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A. zero

B. finite

C. 100 ohms

D. infinite

5819. The resistance of a conductor of diameter d and length l is R ?. If the diameter of the conductor is halved and its length is doubled, the resistance will be
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A. R ?

B. 2R ?

C. 4R ?

D. 8R ?
5820. With rise in temperature the resistance of pure metals______________?
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A. decreases

B. increases

C. remains constant

D. first increases and then decreases