electrical engineering MCQs – Page 212

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 Review each marked answer and report any item that may be outdated or unclear.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 generation 2. analog electronics 3. solid state switching circuits 4. parallel circuits 5. switchgear and protection 6. op amp circuits 7. transistor audio power amplifiers 8. electrostatics 9. heating and welding 10. multi stage transistor amplifiers 11. passive filters 12. network theorems 13. regulated d c power supply 14. a c fundamentals circuits and circuit theory 15. electromagnetic induction 16. power electronics 17. magnetism and electromagnetism 18. transformers 19. modulation and demodulation 20. d c generators 21. semiconductor theory 22. single phase induction motors 23. semiconductor diode 24. hybrid parameters 25. digital electronics 26. oscillators 27. earthing or grounding 28. single stage transistor amplifiers 29. d c motors 30. transistor biasing 31. amplifiers with negative feedback 32. basic electrical 33. electronic instruments 34. synchronous motors 35. field effect transistors fet 36. magnetic circuit 37. control systems 38. industrial drives 39. power generation 40. series parallel circuits 41. transistor tuned amplifiers 42. electrical engineering materials 43. rectifiers and converters 44. integrated circuits 45. scr silicon controlled rectifiers 46. cables 47. polyphase induction motors 48. measurement and instrumentation 49. transistors 50. electrical machine design 51. electrolysis and storage of batteries 52. electric traction 53. transmission and distribution

4221. A 5 ?F capacitor has a potential difference across its plates of 200 volts. The charge on the capacitor is____________?
0

A. 4 x 103 C

B. 2.5 x 10-8 C

C. 10-5 C

D. 103 C

4222. Selenium becomes a conductor in light so it behaves like____________?
0

A. Semiconductor

B. Photodiode

C. Light emitting diode

D. Capacitor

4223. One volt is the same as___________?
0

A. one coulomb/joule

B. one joule/coulomb

C. one coulomb

D. one joule

4224. In a capacitive circuit___________?
0

A. a steady value of applied voltage causes discharge

B. an increase in applied voltage makes a capacitor charge

C. decrease in applied voltage makes a capacitor charge

D. none of the above

4225. The unit of dielectric strength is given by___________?
0

A. V/m

B. m/V2

C. V2/m

D. m/V

4226. A capacitance of 100 fiF is connected in series with a resistance of 8000 2. The time constant of the circuit is______________?
0

A. 0.8 s

B. 0.2 s

C. 0.4 s

D. 0.6 s

4227. capacitors are used in transistor circuits?
0

A. Ceramic

B. Air

C. Paper

D. Electrolytic

4228. A capacitor is a perfect insulator for______________?
0

A. direct current

B. alternating current

C. both for the direct and alternating current

D. none of above

4229. 1 volt/meter is same as___________?
0

A. 1 newton/meter

B. 1 meter/coulomb

C. 1 joule/coulomb

D. 1 newton meter

4230. A capacitance is a circuit component that opposes the change in circuit__________?
0

A. Current

B. impedance

C. None of the above

D. Voltage

4231. Which of the following capacitors will have the least variation ____________?
0

A. Silver plated mica capacitor

B. None of the above

C. Ceramic capacitor

D. Paper capacitor

4232. The time constant of an R-C circuit is defined as the time during which capacitor charging voltage actually rises to _________ percent of its value
0

A. 37, initial

B. 62, initial

C. 37, final

D. 62, final

4233. A paper capacitor is usually available in the form of_____________?
0

A. disc

B. meshed plates

C. tubes

D. rolled foil

4234. Energy stored in the electric field of a capacitor C when charged from a D.C source of voltage V is equal to joules_______________?
0

A. CV

B. CV2

C. C2V

D. CV2

4235. A positive and a negative charge are initially 50 mm apart. When they are moved close together so that they are now only 10 mm apart, the force between them will be________________?
0

A. 10 times greater than before

B. 5 times greater than before

C. 5 times smaller than before

D. 25 times larger than before

4236. The capacity of capacitor bank used in power factor correction is expressed in terms of____________?
0

A. volts

B. kVAR

C. kVA

D. kW

4237. The electric field intensity at a point situated 4 meters from a point charge is 200 N/C. If the distance is reduced to 2 meters, the field intensity will be______________?
0

A. 1200 N/C

B. 400 N/C

C. 600 N/C

D. 800 N/C

4238. An electrolytic capacitor can be used for_____________?
0

A. D.C. only

B. AC. only

C. both D.C. as well as A.C.

4239. For a good 0.05 uF capacitor ohmmeter reading should___________?
0

A. show high resistance momentarily and then a very low resistance

B. show low resistance momentarily and back off to a very high resistance

C. not move at all

D. go quickly to 50 ohm approximately and remain there

4240. If a third equal and similar charge is placed between two equal and similar charges, then this third charge will_____________?
0

A. be in unstable equilibrium

B. move out of the field of influence of the two charges

C. remain in stable equilibrium

D. not be in equilibrium

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