electrical engineering MCQs – Page 184

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 Review each marked answer and report any item that may be outdated or unclear.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
3661. In obtaining the frequency response curve of an amplifier, the______________?
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A. Amplifier level output is kept constant

B. Generator output level is held constant

C. Generator frequency is held constant

D. Amplifier frequency is held constant

3662. In a certain low-pass filter, fc = 3.5 kHz. Its passband is____________?
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A. 0 Hz

B. 7 kHz

C. 3.5 kHz

D. 0 Hz to 3.5 kHz
3663. For long distance transmission the transformer used is_____________?
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A. Step up

B. Input voltage and output voltage remain same

C. Step down

D. Amplifier is used

3664. 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. depends upon composition of dielectric

B. remain constant

C. decrease

D. increase

3665. Electric intensity being a vector quantity always points_______________?
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A. any of above

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

C. opposite to the direction of force experienced by a unit positive charge

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

3666. In the initial stages of a multistage amplifier, we use______________?
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A. Direct coupling

B. Transformer coupling

C. None of the above

D. RC coupling
3667. The value of the capacitance depends upon the________________?
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A. voltage applied

B. dinsity of the capacitor plates

C. thickness of the capacitor plates

D. geometry of the capacitor
3668. The out put voltage of a transformer is 3 times the input voltage then turns ratio will be________________?
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A. 3

B. 3-Jan

C. 6

D. 1

3669. 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. 3,000 ?

B. 300 ?

C. 24 ?

D. 2.4 ?

3670. A radio receiver has____________of amplification?
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A. More than one stages

B. Two stages

C. One stage

D. Three stages

3671. 1 db corresponds to_____________change in power level?
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A. 50%

B. 26%

C. 22%

D. 35%

3672. A capacitor is a perfect insulator for______________?
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A. direct current

B. alternating current

C. both for the direct and alternating current

D. none of above

3673. The purpose of d.c. conditions in a transistor is to___________________?
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A. Reverse bias the emitter

B. None of the above

C. Set up operating point

D. Forward bias the collector

3674. Which one of the following functions like a motor ?
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A. voltmeter

B. galvanometer

C. ammeter

D. all of above
3675. In order to get more voltage gain from a transistor amplifier, the transistor used should have_________________?
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A. Thin base

B. None of the above

C. Wide emitter

D. Thin collector

3676. A 12 k? resistor, a 15 k? resistor, and a 22 k? resistor are in series with two 10 k? resistors that are in parallel. The source voltage is 75 V. Current through the 15 k? resistor is approximately___________?
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A. 5 mA

B. 14 mA

C. 1.4 mA

D. 50 mA

3677. The self-inductance of a solenoid is increased when a soft iron core is inserted into it. This is because the soft iron core_______________?
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A. Reduces the effect of eddy current

B. Decreases the resistance of the solenoid

C. Improves the flux linkage between the turns of the coil

D. Increases the mutual inductance between the solenoid and the core

3678. The output signal voltage and current of a power amplifier are 5V and 200 mA; the values being r.m.s. What is the power output ?
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A. 1 W

B. 2 W

C. None of the above

D. 4 W

3679. If the coil is wound on an iron core the flux through it will_______________?
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A. become zero

B. increase

C. decrease

D. remain the same

3680. The parallel combination of a 6.8 k? resistor and a 10 k? resistor is in series with the parallel combination of a 2.2 k? resistor and a 1 k? resistor. A 100 V source is connected across the circuit. The resistor(s) with the greatest voltage drop is (are)___________?
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A. 6.8 k?

B. 2.2 k?

C. 2.2 k? and 1 k?

D. 6.8 k? and 10 k?