electrical engineering MCQs – Page 103

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 Review each marked answer and report any item that may be outdated or unclear.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

2041. Ionization in circuit breaker is facilitated by___________?
0

A. increasing field strength

B. increase of mean free path

C. high temperature

D. all of the above

2042. In the differential voltage gain & the common mode voltage gain of a differential amplifier are 48db & 2db respectively, then its common mode rejection ratio is________________?
0

A. 25dB

B. 46dB

C. 23dB

D. 50dB

2043. A fuse is never inserted in____________?
0

A. negative of D.C. circuit

B. phase dine

C. positive of D.C. circuit

D. neutral wire

2044. The material used for fuse must have_____________?
0

A. low melting point and -low specific resistance

B. high melting point and low specific resistance

C. low melting point and any specific resistance

D. low melting point and high specific resistance

2045. The time of closing the cycle, in modern circuit breakers is_____________?
0

A. 0.10 sec

B. none of the above

C. 0.001 sec

D. 0.01 sec

E. 0.003 sec

2046. A rotary converter is a single machine with______________?
0

A. one armature and one field

B. none of the above

C. one armature and two fields

D. two armatures and one field

2047. Circuit breakers are essentially____________?
0

A. current carrying contacts called electrodes

B. circuits to break the system

C. transformers to isolate the two systems

D. any of the above

E. arc extinguishers

2048. The two conductors of a transmission line carry equal current I in opposite directions. The force on each conductor is________________?
0

A. proportional to distance between the conductors

B. inversely proportional to I

C. proportional to 7

D. proportional to X

2049. A material which is slightly repelled by a magnetic field is known as_____________?
0

A. diamagnetic material

B. paramagnetic material

C. conducting material

D. ferromagnetic material

2050. Core of an electromagnet should have____________?
0

A. low coercivity

B. high susceptibility

C. both of the above

D. none of the above

2051. relay is preferred for phase fault on short transmission line?
0

A. Induction type

B. None of the above

C. Impedance

D. Reactance

2052. In the left hand rule, forefinger always represents______________?
0

A. magnetic field

B. current

C. voltage

D. direction of force on the conductor

2053. For which of the following materials the saturation value is the highest ?
0

A. Ferromagnetic materials

B. Paramagnetic materials

C. Diamagnetic materials

D. Ferrites

2054. A short-circuit is identified by_____________?
0

A. heavy current flow

B. no current flow

C. voltage drop

D. voltage rise

2055. The cathdde voltage drop, in a mercury arc rectifier, is due to_____________?
0

A. expenditure of energy in overcoming the electrostatic field

B. expenditure of energy in liberating electrons from the mercury

C. expenditure of energy in ionization

D. surface resistance

2056. D.C. shunt relays are made of_____________?
0

A. few turns of thin wire

B. many turns of thin wire

C. few turns of thick wire

D. many turns of thick wire

2057. What will be the current passing through the ring shaped air cored coil when number of turns is 800 and ampere turns are 3200 ?
0

A. 4

B. 8

C. 6

D. 2

2058. When two ends of a circular uniform wire are joined to the terminals of a battery, the field at the center of the circle?
0

A. will depend on the radius of the circle

B. will be zero

C. will depend on the amount of e.m.f. applied

D. will be infinite

2059. A thermal protection switch can protect against_____________?
0

A. temperature

B. short-circuit

C. overload

D. over voltage

2060. A 200 turn coil having an axial length of 30 mm and a radius of 10 mm is pivoted in a magnetic field having a flux density of 0.8 T. If the coil carries a current of 0.5 A, the torque acting on the coil will be_____________?
0

A. 0.48 N-m

B. 0.0048 N-m

C. 8 N-m

D. 0.048 N-m

Previous Next

Showing 2041 to 2060 of 7381 mcqs