electrical engineering MCQs – Page 327

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 Review each marked answer and report any item that may be outdated or unclear.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
6521. The minority carrier concentration is largely a function of_____________?
comments icon0
A. temperature

B. reverse biasing voltage

C. the amount of doping

D. forward biasing voltage

6522. Carbon resistors are used extensively because they are____________?
comments icon0

A. compact

B. inexpensive

C. all of the above reasons

D. easy to make

6523. _________ is an example of piezoelectric material?
comments icon0

A. Glass

B. Quartz

C. Neoprene

D. Corrundum

6524. Carbon bearings are used under which of the following conditions ?
comments icon0

A. Where corrosive chemical action exists

B. All of the above

C. Where high temperature exists

D. Where lubrication is difficult or im-possible

6525. __________ is a hard solder?
comments icon0
A. Copper-zinc

B. Tin-lead

C. None of the above

D. Tin-silver-lead

6526. Due to which of the following fact, in India, aluminium is replacing copper ?
comments icon0

A. Aluminium has lower resistivity than that of copper

B. Aluminium is available in plenty, cheaper and lighter than copper

C. Aluminium has less temperature co-efficient than copper

D. Aluminium is more ductile and malleable than copper

6527. Which of the following is a semiconductor material ?
comments icon0

A. Phosphorous

B. Rubber

C. Aluminium

D. Silicon
6528. Which of the following are non-conductors of electricity?
comments icon0

A. Non-metal solids except carbon

B. Air and most other gases

C. Pure water and liquids in general except mercury

D. All of the above
6529. The conductivity of a conductor can be increased by_______________?
comments icon0

A. increasing its temperature

B. decreasing its temperature

C. increasing its vibration

D. decreasing its vibration

6530. A carbon resistor contains_____________?
comments icon0

A. carbon crystals

B. pulverized coal

C. solid carbon granules

D. finely divided carbon black
6531. Copper, even though costly, finds use in the windings of electrical machines because_____________?
comments icon0

A. copper windings are less bulky and the machines become compact

B. copper points offer low contact resistance

C. all of the above

D. copper can be easily soldered and welded

6532. _____________is viscoelastic?
comments icon0

A. Cast-iron

B. Glass

C. Graphite

D. Rubber
6533. The current due to electron flow in conduction band is the hole current in valence band?
comments icon0

A. less than

B. any of the above

C. greater than

D. equal to

6534. The value of critical field below the transition temperature will_______________?
comments icon0

A. any of the above

B. increase

C. remain unchanged

D. decrease

6535. The number of atoms per unit cell in B.C.C. structure is_____________?
comments icon0

A. 8

B. 2

C. 1

D. 4

6536. Most of the common metals have _________ structure?
comments icon0

A. orthorhombic

B. hexagonal

C. cubic

D. linear

6537. The covalent bond is formed by_______________?
comments icon0

A. none of the above

B. transfer of electrons between atoms

C. sharing of variable number of electrons by a variable number of atoms

D. sharing of electrons between atoms
6538. Which of the following is the poorest conductor of electricity ?
comments icon0

A. Aluminium

B. Carbon

C. Steel

D. Silver

6539. For a particular material the Hall coefficient was found to be zero. The material is______________?
comments icon0

A. insulator

B. none of the above

C. intrinsic semiconductor

D. metal
6540. A good electric contact material should have all of the following properties except_____________?
comments icon0

A. high melting point

B. high resistance to corrosion

C. high resistivity

D. good thermal conductivity