electrical engineering MCQs – Page 210

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 Review each marked answer and report any item that may be outdated or unclear.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
4181. Electric flux linked with a surface will be maximum when____________?
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A. The surface is held parallel to the electric field

B. The surface is held perpendicular to the electric field

C. The surface makes an angle of 45with the field

D. All of the above

4182. at a point is equal to the negative potential gradient at that point?
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A. Electric flux

B. Magnetic flux density

C. Magnetic flux

D. Electric intensity
4183. Two oppositely charged balls A and B attract third conducting ball C when placed near them turn by turn. Then ball C must be______________?
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A. positively and negatively charged

B. negatively charged

C. electrically neutral

D. positively charged

4184. The potential gradient across the material of low permittivity is than across the material of high permittivity?
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A. smaller

B. greater

C. both (A) and (B)

D. none of the above

4185. If two charges are increased by two times then force_____________?
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A. Increases 4 times

B. Increases 9 times

C. Decreases 9 times

D. Decreases 4 times

4186. Which of the following material has least value of dielectric constant ?
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A. Ceramics

B. Glass

C. Oil

D. Paper

4187. Which of the following statement is true __________?
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A. The current in the dicharging capacitor grows exponentially

B. The current in the discharging capacitor grows linearly

C. The current in the discharging capacitor decays exponentially

D. The current in the discharging capacitor decreases constantly

4188. Which of the following capacitors will have the least value of breakdown voltage________ ?
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A. Ceramic

B. Electrolytic

C. Paper

D. Mica

4189. A unit tube of flux is known as tube___________?
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A. Newton

B. Faraday

C. Michale

D. None of the above

4190. SI unit of the permittivity of free space is________________?
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A. N-1mC-2

B. Nm2C2

C. NmC-1

D. N-1m-2C2
4191. The force between two charges is 120 N. If the distance between the charges is doubled, the force will be________________?
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A. 60 N

B. 30 N

C. 15 N

D. 40 N

4192. An electric charge at rest produces_______________?
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A. only a magnetic field

B. only an electric field

C. neither electric field nor magnetic field

D. both electric and magnetic fields

4193. A potential of 400 V is applied to a capacitor, the plates of which are 4 mm apart. The strength of electric field is___________?
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A. 100 kV/m

B. 10 kV/m

C. 2 kV/m

D. 5 kV/m

4194. If an electrons is allowed to move along the field in a non uniform electric field then it will follow__________________?
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A. Straight line

B. Curved path

C. Circular path

D. Spiral path

4195. 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 series and third in parallel across this combination

C. all in parallel

D. two in parallel and third in series with this combination
4196. The force per unit charge is know as__________________?
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A. electric intensity

B. electric flux

C. electric potential

D. all of above are same

4197. Two charges are placed at a certain distance. If the magnitude of each charge is doubled the force will become_____________?
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A. 1/4th of its original value

B. 4 times of its original value

C. 1/8th of its original value

D. 8 times of its original value

4198. Which medium has the least dielectric strength ____________?
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A. Air

B. Quartz

C. Paraffin wax

D. Glass

4199. The total electric flux through any closed surface surrounding charges is equal to the amount oflcharge enclosed. The above statement is associated with____________?
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A. Coulombs square law

B. Gausss law

C. Maxwells first law

D. Maxwells second law

4200. Electric force between two point charges in air or vacuum is F. If we replace air or vacuum by an insulator (dielectric) of relative permitivity Cr the force between the charges will_______________?
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A. decrease

B. increase

C. remain constant

D. depends upon composition of dielectric