electrical engineering MCQs – Page 93

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 Review each marked answer and report any item that may be outdated or unclear.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
1841. Reciprocal of reluctance is_______________?
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A. susceptibility

B. reluctivity

C. permeance

D. permeability

1842. What will happen to an insulating medium if voltage more than the breakdown voltage is applied on it__________ ?
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A. Its molecular structure will get changed

B. It will get punctured or cracked

C. It will melt

D. It will become magnetic

1843. Relative permeability of vacuum is__________?
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A. 1 H/m

B. 1/4JI

C. 4n x 10- H/m

D. 1
1844. The power dissipated in a pure capacitor is______________?
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A. zero

B. proportional to applied voltage

C. proportional to value of capacitance

D. both (B) and (C) above

1845. Three capacitors each of the capacity C are given. The resultant capacity 2/3 C can be obtained by using them_____________?
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A. all in series

B. two in parallel and third in series with this combination

C. all in parallel

D. two in series and third in parallel across this combination

1846. If the sheet of a bakelite is inserted between the plates of an air capacitor, the capacitance will__________?
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A. remains unchanged

B. decrease

C. become zero

D. increase
1847. Which of the following statement is true __________?
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A. The current in the discharging capacitor decreases constantly

B. The current in the discharging capacitor grows linearly

C. The current in the discharging capacitor decays exponentially

D. The current in the dicharging capacitor grows exponentially
1848. Which of the following materials has the highest value of dielectric constant___________?
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A. Glass

B. Oil

C. Ceramics

D. Vacuum

1849. A capacitor consists of_____________?
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A. two insulators only

B. two conductors separated by an insulator

C. two insulators separated by a conductor

D. two conductors only

1850. A capacitance is a circuit component that opposes the change in circuit__________?
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A. Voltage

B. None of the above

C. Current

D. impedance

1851. The ignited or auxiliary anode in mercury arc rectifier is made of____________?
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A. aluminium

B. boron carbide

C. graphite

D. copper

1852. Which of the following capacitors preferred for high frequency circuits ?
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A. none of the above

B. Air capacitor

C. Electrolytic capacitor

D. Mica capacitor
1853. Air-core coils are practically free from______________?
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A. hysteresis losses

B. eddy current losses

C. both (A) and (B)

D. none of the above

1854. The relative permittivity has the following units__________?
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A. no units

B. m/F

C. Wb/m

D. F/m

1855. The capacitance of a capacitor is not affected by____________?
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A. area of plates

B. thickness of plates

C. distance between plates

D. all of the above

1856. The initial rate of rise of current through a coil of inductance 10 H when suddenly connected to a D.C. supply of 200 V is__________Vs
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A. 500

B. 20

C. 0.05

D. 50

1857. Which capacitor will be physically smaller for the same ratings ___________?
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A. Ceramic capacitor

B. Paper capacitor

C. Both will be of equal size

D. None of the above

1858. Which of the following capacitors can be used for temperature compensation ?
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A. None of the above

B. Ceramic capacitor

C. Air capacitor

D. Paper capacitor

1859. The ohmmeter reading for a short circuited capacitor is____________?
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A. few megohms

B. zero

C. infinity

D. few kilo ohms

1860. Conductance is analogous to_____________?
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A. inductance

B. reluctance

C. flux

D. permeance