electrical engineering MCQs – Page 104

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 Review each marked answer and report any item that may be outdated or unclear.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
2061. The left hand rule correlates to______________?
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A. current, induced e.m.f. and direction of force on a conductor

B. self induction, mutual induction and direction of force on a conductor

C. magnetic field, electric field and direction of force on a conductor

D. current, magnetic field and direction of force on a conductor
2062. Directional relays are based on flow of____________?
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A. voltage wave

B. power

C. current

D. all of the above

2063. A fuse is connected_______________?
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A. none of the above

B. either in series or in parallel with circuit

C. in parallel with circuit

D. in series with circuit
2064. Burden of a protective relay is the power______________?
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A. required to operate the circuit breaker

B. none of the above

C. developed by the relay circuit

D. absorbed by the circuit of relay
2065. Gilbert is a unit of_______________?
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A. permittivity

B. electromotive force

C. magnetomotive force

D. conductance

2066. One telsa is equal to___________?
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A. 1 Wb/m2

B. 1 mWb/m2

C. 1 Wb/m

D. 1 Wb/mm2

2067. The unit of relative permeability is_____________?
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A. it is dimensionless

B. henry/sq. m

C. henry/metre

D. henry

2068. Which of the following is reversible in action ?
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A. None of the above

B. Any of the above

C. Rotary converter

D. Motor generator set

E. Motor converter

2069. A rotary converter combines the function of____________?
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A. an induction motor and a D.C. generator

B. a D.C. series motor and a D.C. generator

C. none of the above

D. a synchronous motor and a D.C. generator
2070. Tesla is a unit of_____________?
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A. inductance

B. flux density

C. flux

D. field strength

2071. The electromagnet has 50 turns and a current of 1A flows through the coil. If the length of the magnet circuit is 200 mm, what is the magnetic field strength ?
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A. 250 AT/m

B. 2.5 AT/m

C. 2500 AT/m

D. 25 AT/m

2072. A rectangular magnet of magnetic moment M is cut into two piece of same length, the magnetic moment of each piece will be______________?
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A. M

B. M/2

C. M/4

D. 2 M

2073. The two input terminals of an opamp are labeled as______________?
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A. Positive and negative

B. Inverting and non inverting

C. High and low

D. Differential ans non differential

2074. Oil switches are employed for_____________?
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A. low currents circuits

B. high voltages and large currents circuits

C. all circuits

D. low voltages circuits

2075. In a rotary converter armature currents are______________?
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A. partly a.c. and partly d.c.

B. d.c. only

C. a.c. only

2076. The voltage drop between the anode and cathode, of a mercury arc rectifier comprises of the following_____________?
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A. cathode drop and arc drop

B. anode drop and arc drop

C. anode drop, cathode drop and arc drop

D. anode drop and cathode drop

2077. The ideal OP-AMP has the following characteristics
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A. Ri=? ,A=? ,R0=0

B. Ri=? ,A=? ,R0=?

C. Ri=0 ,A=? ,R0=0

D. Ri=0 ,A=? ,R0=?

2078. The information to the circuit breaker under fault conditions is provided by____________?
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A. H.R.C. only

B. rewirable fuse

C. all of the above

D. relay
2079. In a mercury arc rectifier________ flow from anode to cathode
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A. ions

B. any of the above

C. ions and electrons

D. electrons

2080. Two long parallel conductors carry 100 A. If the conductors are separated by 20 mm, the force per meter of length of each conductor will be_____________?
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A. 100 N

B. 0.1 N

C. 10 N

D. 1 N