electrical engineering MCQs – Page 322

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 Review each marked answer and report any item that may be outdated or unclear.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

6421. A voltage divider consists of two 100 k? resistors and a 12 V source. What will the output voltage be if a load resistor of 1 M? is connected to the output?
0

A. 0.57 V

B. 5.7 V

C. 12 V

D. 6 V

6422. A voltage divider consists of two 68 k? resistors and a 24 V source. The unknown output voltage is______________?
0

A. 6 V

B. 0 V

C. 24 V

D. 12 V

6423. A certain voltage divider consists of three 1 k? resistors in series. Which of the following load resistors will have the least effect on the output voltage?
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A. 100 k?

B. 330 ?

C. 1 M?

D. 1 k?

6424. Two 3.3 k? resistors are in series and this series combination is in parallel with a 4.7 k? resistor. The voltage across one of the 3.3 k? resistors is 12 V. The voltage across the 4.7 k? resistor is_________?
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A. 12 V

B. 0 V

C. 6 V

D. 24 V

6425. If R1 is in series with parallel connected to R2 and R3, what happens to total current if R2 opens?
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A. increases

B. remains the same

C. cannot tell

D. decreases

6426. The parallel combination of a 470 ? resistor and a 1.5 k? resistor is in series with the parallel combination of five 1 k? resistors. The source voltage is 50 V. The percentage of the load current through any single 1 K? resistor is__________?
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A. 50%

B. 100%

C. 20 %

D. 25%

6427. A certain Wheatstone bridge has the following resistor values: R1 = 10 k?, R2 = 720 ?, and R4 = 2.4 k?. The unknown resistance is_____________?
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A. 2.4 ?

B. 300 ?

C. 3,000 ?

D. 24 ?

6428. The current flowing through an unloaded voltage divider is called the____________?
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A. resistor current

B. bleeder current

C. load current

D. voltage current

6429. A Wheatstone bridge can be used to determine an unknown_____________?
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A. current

B. resistance

C. voltage

D. power

6430. With 21 V applied, if R1 = 5 ohms, R2 = 35 ohms, and R3 = 14 ohms, what is the current of R2 if R1 is series connected with parallel circuit R2 and R3?
0

A. 200 mA

B. 600 mA

C. 800 mA

D. 400 mA

6431. A device able to supply electrical energy is a __________?
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A. battery

B. conductor

C. nonconductor

D. microwave

6432. The positive (+) and negative (-) ends of the battery are called ___________?
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A. battery knobs

B. circuit diagram

C. battery sides

D. battery terminals

6433. In a seriesparallel circuit consisting of R1 and R2 in series and connected in parallel with R3, if R1 opens, then R2s voltage will:___________?
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A. increase

B. cannot tell

C. remain the same

D. decrease

6434. In a seriesparallel circuit, individual component power dissipation are calculated using_____________?
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A. a percent of the voltage division ratio squared

B. a percent of the total power depending on resistor ratios

C. individual component parameters

D. total current squared multiplied by the resistor values

6435. A certain voltage divider consists of two 12 k? resistors in series. Which of the following load resistors will have the most effect on the output voltage?
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A. 24 k?

B. 18 k?

C. 12 k?

D. 1 M?

6436. The parallel combination of a 470 ? resistor and a 680 ? resistor is in series with the parallel combination of four 2 k? resistors. The total resistance is___________?
0

A. 1,650 ?

B. 77.8 ?

C. 1,078 ?

D. 778 ?

6437. A 6 V battery output is divided down to obtain two output voltages. Three 2.2 k? resistors are used to provide the two taps. The two output voltages are___________?
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A. 2 V, 4 V

B. 2 V, 6 V

C. 4 V, 6 V

D. 2 V, 2 V

6438. The internal resistance of a 20,000 ohm/volt voltmeter set on its 5 V range is_____________?
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A. 20,000 ?

B. 200,000 ?

C. 1,000,000 ?

D. 100,000 ?

6439. When a Wheatstone bridge is in a balanced condition, the center voltmeter in the bridge will read_____________?
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A. the same as the source voltage

B. twice the source voltage

C. zero volts

D. half the source voltage

6440. The first goal to accomplish in analyzing a complex series-parallel circuit is to____________?
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A. equate all series components

B. equate all parallel components

C. solve for the total current and resistance

D. solve for all the voltage drops

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