electrical engineering MCQs – Page 213

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 Review each marked answer and report any item that may be outdated or unclear.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
4241. A field line and an equipotential surface are____________?
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A. always at 90

B. none of the above

C. always parallel

D. inclined at any angle 0

4242. If mica sheet is placed between the plates of a capacitor the capacity_______________?
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A. decreases then increases

B. decreases

C. increases

D. increases then decreases

4243. Which of the following capacitors is marked for polarity ?
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A. Mica

B. Air

C. Paper

D. Electrolytic
4244. An electric field can deflect_______________?
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A. Neutrons

B. X-rays

C. Both glass rod and silk acquire a negative charge

D. None
4245. If three 15 uF capacitors are connected in series, the net capacitance is
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A. 50 uF

B. 5 uF

C. 30 uF

D. 45 uF

4246. If the distance between the two point charges become half then force between them becomes______________?
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A. remains same

B. half

C. four times

D. double

4247. The value of dielectric constant for vacuum is taken as____________?
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A. 4

B. 1

C. zero

D. 10

4248. In a cable capacitor, voltage gradient is maximum at the surface of the______________?
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A. sheath

B. insulator

C. conduction

D. earth

4249. The capacitance between two plates increases with____________?
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A. shorter plate area and shorter distance between them

B. shorter plate area and higher applied voltage

C. larger plate area and shorter distance between plates

D. larger plate area, longer distance between plates and higher,applied voltage

4250. The surface integral of the normal component of the electric displacement D over any closed surface equals the charge enclosed by the surface. The above statement is associated with_______?
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A. Faradays law

B. Gausss law

C. Kirchhoff s law

D. Lenzs law

4251. The minimum charge on any object cannot be less than_______________?
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A. no definite value exist

B. 1.6 x 10-19C

C. 9.1 x 109C

D. 3.2 x 10-19C

4252. Dielectric constant for mica is nearly_____________?
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A. 200

B. 100

C. 1 to 2

D. 3 to 8
4253. If metallic conductor is charged negatively then its weight______________?
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A. Increases for a while

B. First increases then decreases

C. Remains same

D. Decreases then increases

4254. The minimum value of potential gradient in a cable occurs in____________?
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A. conductor

B. uniformly all over

C. outer sheath

D. insulation
4255. For closer tolerances which of the following capacitors is usually preferred ?
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A. Ceramic disc capacitor

B. Mica capacitor

C. None of the above

D. Paper capacitor

4256. A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is_____________?
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A. 0.6 F

B. 0.8 F

C. 0.12 F

D. 0.024 F
4257. Dielectric strength of mica is___________?
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A. 10 to 20 kV/mm

B. 30 to 50 kV/mm

C. 50 to 200 kV/mm

D. 300 to 500 kV/mm

4258. The value of the capacitance depends upon the________________?
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A. thickness of the capacitor plates

B. geometry of the capacitor

C. dinsity of the capacitor plates

D. voltage applied

4259. Electric intensity being a vector quantity always points_______________?
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A. opposite to the direction of force experienced by a unit positive charge

B. along the direction of force experienced by a unit positive charge

C. perpendicular to the direction of force experienced by a uit positive charge

D. any of above

4260. If an ohmmeter reading immediately goes practically to zero and stays there, capacitor is___________?
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A. satisfactory

B. charged

C. lossy

D. short-circuited