electrical engineering MCQs – Page 219

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 Review each marked answer and report any item that may be outdated or unclear.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

4361. An RC high-pass filter consists of a 0.2 F capacitor and a 220 ? resistor. The output is taken across the resistor. The circuits critical frequency is_____________?
0

A. 7,234 Hz

B. 723 Hz

C. 362 Hz

D. 3,617 Hz

4362. An RL high-pass filter consists of a 470 ? resistor and a 600 mH coil. The output is taken across the coil. The circuits critical frequency is___________?
0

A. 1,250 Hz

B. 5,644 Hz

C. 125 Hz

D. 564 Hz

4363. A series resonant band-stop filter consists of a 68 ? resistor, a 110 mH coil, and a 0.02 F capacitor. The internal resistance, RW, of the coil is 4 ?. Input voltage is 200 mV. Output voltage is taken across the coil and capacitor in series. What is the output voltage magnitude at f0?
0

A. 200 mV

B. 111 mV

C. 11.1 mV

D. 1.1 mV

4364. In a certain low-pass filter, fc = 3.5 kHz.if the input voltage is a 6 V sine wave with a dc level of 10 V, what is the output voltage magnitude?
0

A. 597 mV

B. 6 V

C. 5.97 V

D. 0 V

4365. An RL low-pass filter consists of a 5.6 mH coil and a 3.3 k? resistor. The output voltage is taken across the resistor. The circuits critical frequency is______________?
0

A. 86.12 kHz

B. 93.8 Hz

C. 93.8 kHz

D. 861 Hz

4366. In a series resonant band-pass filter, a lower value of Q results in______________?
0

A. a higher resonant frequency

B. a smaller bandwidth

C. a higher impedance

D. a larger bandwidth

4367. The maximum output voltage of a certain low-pass filter is 15 V. The output voltage at the critical frequency is_____________?
0

A. 15 V

B. 21.21 V

C. 0 V

D. 10.60 V

4368. An RC high-pass filter consists of an 820 ? resistor. What is the value of C so that Xc is ten times less than Rat an input frequency of 12 kHz?
0

A. 161 F

B. 220 F

C. 0.161 F

D. 81 F

4369. At a certain frequency, the output voltage of a filter is 6 V and the input is 12 V. The voltage ratio in decibels is_____________?
0

A. 6.02 dB

B. 12.04 dB

C. -12.04 dB

D. -6.02 dB

4370. An RC low-pass filter consists of a 120 ? resistor and a 0.002 F capacitor. The output is taken across the capacitor. The circuits critical frequency is___________?
0

A. 60 kHz

B. 333 kHz

C. 633 kHz

D. 331 kHz

4371. Vout = 500 mV, and Vin = 1.3 V. The ratio Vout/ Vin expressed in dB is__________?
0

A. -8.30 dB

B. 0 dB

C. 0.8 dB

D. 8.30 dB

4372. A parallel resonant band-pass filter consists of a 90 ? resistor in series with a parallel network made up of a 60 mH coil and a 0.02 F capacitor. The output is taken across the capacitor/coil. The coil winding has a resistance of 20 ?. What is the center frequency of the filter?
0

A. 459 Hz

B. 999 Hz

C. 4,591 Hz

D. 2,176 Hz

4373. A sinusoidal voltage with a peak-to-peak value of 18 V is applied to an RC low-pass filter. If the reactance at the input frequency is zero, the output voltage is____________?
0

A. 18 V peak-to-peak

B. 9 V peak-to-peak

C. zero

D. 12.74 V peak-to-peak

4374. In a certain low-pass filter, fc = 3.5 kHz. If the input voltage is a 6 V sine wave with a dc level of 10 V, what is the output voltage magnitude?
0

A. 5.97 V

B. 597 mV

C. 0 V

D. 6 V

4375. A series resonant band-pass filter consists of a 2 mH coil, a 0.005 F capacitor, and a 120 ? resistor. The winding resistance of the coil is 12 ?. The output voltage is taken off the resistor. Input voltage is 12 Vrms. What is the output voltage magnitude at the center frequency (f0)?
0

A. 12 V

B. 10.9 V

C. 1.09 V

D. 1.1 V

4376. In Thevenins theorem, to find Z
0

A. all independent voltage and current sources are short circuited

B. all independent voltage sources are short circuited and all independent current sources are open circuited

C. all independent voltage sources are open circuited and all independent current sources are short circuited

D. all independent current sources are short circuited and independent voltage sources are open circuited

4377. A closed path made by several branches of the network is known as____________?
0

A. branch

B. junction

C. loop

D. circuit

4378. A capacitor is generally a____________?
0

A. linear and bilateral component

B. bilateral and active component

C. non-linear and active component

D. active, passive, linear and nonlinear component

4379. If the energy is supplied from a source, whose resistance is 1 ohm, to a load of 100 ohms the source will be___________?
0

A. a voltage source

B. a current source

C. both of above

D. none of the above

4380. Which of the following is a bilateral element?
0

A. Constant current source

B. Capacitance

C. None of the above

D. Constant voltage source

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