electrical engineering MCQs – Page 328

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 Review each marked answer and report any item that may be outdated or unclear.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
6541. The conductors have transport phenomena of electrons due to____________?
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A. electric field

B. none of the above

C. magnetic field

D. electromagnetic field

6542. The impurity atoms is semiconductors_____________?
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A. inject more charge carriers

B. increase the kinetic energy of valence electrons

C. reduce the energy gap

D. all of the above

6543. In a crystal, an atom vibrates at a frequency determined by_______________?
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A. the heat content of the crystal

B. the temperature of the crystal

C. the stiffness of the bonds it makes with neighbors
6544. If the resistance of a conductor does not vary in accordance with Ohms law it is known as____________?
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A. bad-conductor

B. reverse conductor

C. non-conductor

D. non-linear conductor
6545. A perfect conductor has_____________?
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A. unity conductivity

B. none of the above

C. infinite conductivity

D. zero conductivity

6546. Thermonic emission occurs in______________?
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A. vacuum tubes

B. transistors

C. ferrite cores

D. copper conductors

6547. By increasing impurity content in the metal alloy the residual resistivity always_____________?
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A. decreases

B. remains constant

C. increases

D. becomes temperature independent

6548. The converse of hardness is known as______________?
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A. softness

B. toughness

C. none of the above

D. malleability

6549. The kinetic energy of a bounded electron is______________?
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A. infinite

B. none of the above

C. greater than that of unbounded electron

D. less than that of unbounded electron

E. equal to that of unbounded electron

6550. Non-linear resistors______________?
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A. produce harmonic distortion

B. none of the above

C. follows Ohms law at low temperatures only

D. result in non-uniform heating

6551. The photo-electric effect occurs only when the incident light has more than a certain critical____________?
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A. speed

B. wave length

C. frequency

D. intensity

6552. The resistivity of a metal is a function of temperature because_____________?
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A. the electron density varies with temperature

B. the amplitude of vibration of the atoms varies with temperature

C. the electron gas density varies with temperature

6553. In conductors conduction of electricity takes place due to movement of_______________?
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A. negative ions only

B. electrons only

C. none of the above

D. positive and negative ions

E. positive ions only

6554. Piezoelectric materials serve as a source of ____________ ?
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A. resonant waves

B. ultrasonic waves

C. musical waves

D. microwaves

6555. Which of the following high resistance materials has the highest operating temperature ?
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A. Kanthal

B. Eureka

C. Nichrome

D. Manganin

6556. The transition temperature of mercury is____________?
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A. 4.12K

B. 9.22K

C. 1.14K

D. 18.0K

6557. Overhead telephone wires are made of_____________?
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A. steel

B. ACSR conductors

C. aluminium

D. copper

6558. Which of the following variety of copper has the best conductivity ?
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A. Pure annealed copper

B. Hard drawn copper

C. Induction hardened copper

D. Copper containing traces of silicon

6559. Constantan contains_______________?
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A. copper and nickel

B. tungsten and silver

C. copper and tungsten

D. silver and tin

6560. The tiny block formed by the arrangement of a small group of atoms is called the____________?
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A. either A. or (b)

B. none of the above

C. space lattice

D. unit cell