electrical engineering MCQs – Page 295

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 Review each marked answer and report any item that may be outdated or unclear.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
5881. All good conductors have high____________?
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A. conductance

B. resistance

C. reluctance

D. thermal conductivity

5882. An electric filament bulb can be worked from____________?
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A. All above

B. Battery supply only

C. A. C. supply only

D. D. C. supply only

5883. Three identical resistors are first connected in parallel and then in series. The resultant resistance of the first combination to the second will be_________________?
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A. 9 times

B. 3 times

C. 1/9 times

D. 1/3 times

5884. When a voltage of one volt is applied, a circuit allows one micro ampere current to flow through it. The conductance of the circuit is___________?
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A. 106 mho

B. 1 n-mho

C. none of the above

D. 1 milli-mho

5885. Three 6 ohm resistors are connected to form a triangle. What is the resistance between any two corners ___________?
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A. 8/3 Q

B. 6 Q

C. 3/2 Q

D. 4 Q
5886. In an electric kettle water boils in 10 m minutes. It is required to boil the boiler in 15 minutes, using same supply mains______________?
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A. length of heating element should be decreased

B. length of heating element should be increased

C. length of heating element has no effect on heating if water

D. none of the above

5887. The ratio of mass of proton to that of electron is nearly_____________?
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A. 1840

B. 4

C. 1840

D. 30

5888. With three resistances connected in parallel, if each dissipates 20 W the total power supplied by the voltage source equals_____________?
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A. 20 W

B. 40 W

C. 60 W

D. 10 W

5889. If the efficiency of a machine is to be high, what should be low __________?
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A. Ratio of output to input

B. Losses

C. kWh consumed

D. Input power

E. True component of power

5890. Voltage dependent resistors are usually made from________________?
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A. Nichrome

B. Graphite

C. Charcoal

D. Silicon Carbide
5891. Electric current passing through the circuit produces_____________?
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A. luminous effect

B. all above effects

C. chemical effect

D. thermal effect

E. magnetic effect

5892. The number of electrons in the outer most orbit of carbon atom is___________?
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A. 3

B. 7

C. 4

D. 6

5893. When electric current passes through a bucket full of water, lot of bubbling is observeD. This suggests that the type of supply is____________?
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A. D. C.

B. any of above two

C. A. C.

D. none of the above

5894. Two multimeters A and B have sensitivities of 10 kO/V and 30 kO/V respectively. Then ______________?
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A. Multimeter A is more sensitive

B. Multimeter B is more sensitive

C. Both are equally sensitive

D. None of the above

5895. A VTVM is never used to measure ______________?
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A. None of the above

B. Resistance

C. Voltage

D. Current
5896. Which of the following is likely to have the largest resistance ?
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A. Moving coil galvanometer

B. A copper wire of length 1 m and diameter 3 mm

C. Ammeter of range 1 A

D. Voltmeter of range 10 V
5897. A series ohmmeter circuit uses a 3 V battery and a 1 mA meter movement. What is the half-scale resistance for this movement ?
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A. 3 kO

B. kO

C. 6 kO

D. kO

5898. A voltmeter has a resistance of G ohms and range V volts. The value of resistance required in series to convert it into voltmeter of range nV is________________?
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A. (n-1)G

B. G/(n-1)

C. nG

D. G/n

5899. The most accurate device for measuring voltage is ____________?
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A. Voltmeter

B. VTVM

C. CRO

D. Multimeter

5900. The resistance of an ideal voltmeter is ______________?
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A. Low

B. Infinite

C. High

D. Zero