electrical engineering MCQs – Page 127

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 Review each marked answer and report any item that may be outdated or unclear.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

2521. In a radio receiver, we generally use .. oscillator as a local oscillator
0

A. Wien-bridge

B. Crystal

C. Phase-shift

D. Hartley

2522. Due to which of the following reasons aluminium does not corrode in atmosphere ?
0

A. Atmospheric oxygen can only diffuse very slowly through the oxide layer which is formed on the surface of aluminium

B. Aluminium is a noble metal

C. No reaction with oxygen occurs ft Any of the above

2523. If Amin = 40 and Amax = 60, what is the percentage of modulation?
0

A. 20 %

B. 10%

C. 40%

D. 50%

2524. Super conductivity can be destroyed by_____________?
0

A. reducing temperatures

B. adding impurities

C. any of the above

D. application of magnetic field

2525. In an op-amp differentiator:________________?
0

A. output occurs when input is finite and constant

B. polarity of input and output is the same

C. the amplitude of output is proportional to rate of change of input

D. the amplitude of output is proportional to input

2526. A tuned amplifier is used in ___________ applications?
0

A. None of the above

B. Radio frequency

C. Audio frequency

D. Low frequency

2527. MOSFET can be used as a__________?
0

A. current controlled inductor

B. current controlled capacitor

C. voltage controlled inductors

D. voltage controlled capacitor

2528. An SCR can exercise control over____________of a.c. supply?
0

A. Positive half-cycles only

B. Negative half-cycles only

C. Both positive and negative half-cycles

D. Positive or negative half-cycles

2529. At parallel resonance, the net reactive component circuit current is _______________?
0

A. Capacitive

B. None of the above

C. Zero

D. Inductive

2530. Steel wire is used as____________?
0

A. all of the above

B. overhead telephone wire

C. earth wire

D. core wire of ACSR

2531. The function of ferrite antenna is to_________________?
0

A. Reduce noise

B. Stabilise d.c. bias

C. Reduce stray capacitance

D. Increase the Q of tuned circuit

2532. The conductivity of a metal is determined by____________?
0

A. the number of valence electrons per atom

B. either (A) or (B)

C. the electronic concentration and the mobility of the free electrons

D. none of the above

2533. An OPAMP has a slew rate of 5 V/? S .The largest sine wave O/P voltage possible at a frequency of 1 MHZ is [Hint: Slew rate is defined as the max. rate of change of output voltage. Its unit is V/?S.
0

A. 10 volts

B. 5/1 volts

C. 5 volts

D. 5/2 volts

2534. The coils of D.C. motor starter are wound with wire of_______________?
0

A. manganin

B. kanthal

C. copper

D. nichrome

2535. At transition temperature the value of critical field is____________?
0

A. positive real value

B. complex value

C. zero

D. negative real value

2536. The dimensions of L/CR are that of _______________?
0

A. Farad

B. Henry

C. None of the above

D. Ohm

2537. If gate current is increased, then anode-cathode voltage at which SCR closes_________________?
0

A. Is decreased

B. Remains the same

C. Is increased

D. None of the above

2538. is a negatively charged particle present in an atom______________?
0

A. Neutron

B. None of the above

C. Proton

D. Electron

2539. The resistivity of a metal is a function of temperature because_____________?
0

A. the electron gas density varies with temperature

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

C. the electron density varies with temperature

2540. The horizontal intercept of dc load line is the same as ideal____________?
0

A. quasi saturation point

B. cut off point

C. saturation point

D. operating point

Previous Next

Showing 2521 to 2540 of 7381 mcqs