HomeElectronics Multiple choice question MCQ online testmcq on voltage regulator and power supply mcq on voltage regulator and power supply Leave a Comment / Electronics Multiple choice question MCQ online test Share this 0% 0 votes, 0 avg Created on September 14, 2022DC Power supply Regulated DC power supply MCQ 1 / 56 1. Which transformer increases the voltage? a. Step down b. None of the above c. Step up d. Both a and b 2 / 56 2. The maximum rectification efficiency of bridge full-wave rectifier is around a. 10% b. 40% c. 81.2% d. 30% 3 / 56 3. The maximum rectification efficiency of the center tapped full-wave rectifier is a. 40% b. 30% c. 81.2% d. 10% 4 / 56 4. A power supply which has voltage regulation of ……….. is unregulated power supply a. 10 % b. 0 % c. 5 % d. 8% 5 / 56 5. An ideal regulated power supply is one which has voltage regulation of ………… a. 5% b. 10% c. 1% d. 0% 6 / 56 6. The diode is a _______ device a. Dynamic b. Non-linear c. Static d. Linear 7 / 56 7. Which filter reduces the ripple? a. Capacitor filter b. RC filter c. None of the above d. LC filter 8 / 56 8. The output obtained by the rectifier is a. Pulsating AC b. Non-pulsating AC c. Pulsating DC d. None 9 / 56 9. filter is used to obtain DC voltage with some ripple a. Capacitor filter b. None of the above c. RC filter d. LC filter 10 / 56 10. A power supply has a voltage regulation of 1%. If the no-load voltage is 20 V, what is the full-load voltage? a. 2 V b. 8 V c. 7 V d. 6V 11 / 56 11. The disadvantages of linear DC power supply are a. Large size b. All of the above c. Efficiency is low d. Costly 12 / 56 12. Which transformer is used in a regulated DC power supply? a. Step up b. Both a or b c. Step down d. None of the above 13 / 56 13. For increasing the voltage rating, zeners are connected in ………….. a. Series b. None of the above c. Parallel d. Series-parallel 14 / 56 14. The unregulated power supply used in a. Solenoids b. Actuators c. All of the above d. Relays 15 / 56 15. How many types of regulated power supplies are there? a. One b. Four c. Three d. Two HintAdjustable voltage regulatorZener diode regulatorsCurrent limitersSeries regulators 16 / 56 16. The Zener current will be minimum when ………… a. None of the above b. Load current is zero c. Load current is minimum d. Load current is maximum 17 / 56 17. allows DC but it blocks AC a. None b. Inductor c. Conductor d. Insulator 18 / 56 18. Output of a phase splitter is a. a pair of sine waves of unequal amplitudes and opposite phase b. a pair of sine waves of equal amplitudes and opposite phase c. a pair of sine waves of equal amplitudes d. a pair of sine waves of unequal amplitude 19 / 56 19. The maximum rectification efficiency of half-wave rectifier is around a. 20% b. 10% c. 40% d. 30% 20 / 56 20. The output voltage of a switch-mode power supply is a. More b. More or less c. very less d. Less 21 / 56 21. The switch-mode power supply categorized into a. Four b. One c. Six d. Three HintAC in DC outDC in DC outDC in AC outAC in AC out 22 / 56 22. The AC component present in output voltage is called a. Non-linear regulators b. Switching regulator c. None d. Ripple 23 / 56 23. are the building blocks of regulated DC power supply a. Step down transformer b. Rectifier, DC filter c. All of the above d. Regulator 24 / 56 24. The rectifiers are categorized into a. Two b. Three c. One d. Four Half wave and Full wave rectifier 25 / 56 25. The transient response of linear power supply is around a. 10µs b. 120µs c. 100µs d. 20µs 26 / 56 26. The Zener current is maximum when the load current is a. infinity b. one c. zero d. None of the above 27 / 56 27. A regulated DC power supply is also known as a. linear power supply b. dual power supply c. None of the above d. hyper power supply 28 / 56 28. In an unregulated power supply, if input a.c. voltage increases, the output voltage ……. a. None of the above b. Decreases c. Increases d. Remains the same 29 / 56 29. Two similar 15 V Zeners are connected in series. What is the regulated output voltage? a. 5 V b. 15 V c. 45 V d. 30 V 30 / 56 30. If the load current drawn by unregulated power supply increases, the d.c. output voltage ……….. a. None of the above b. Decreases c. Increases d. Stays the same 31 / 56 31. ..............rectifiers are full-wave rectifiers a. Both a and b b. None of the above c. Bridge d. Center-tapped 32 / 56 32. In a Zener voltage regulator, the changes in load current produce changes in ……………. a. None of the above b. Zener current c. Zener voltage d. Zener voltage as well as Zener current 33 / 56 33. The rectification is a process of converting............. a. Alternating current or voltage into direct quantity b. Alternating voltage into direct quantity c. Alternating current into direct quantity d. Alternating current or voltage into direct quantity 34 / 56 34. The output of the rectification is ................ a. Unidirectional b. None of the above c. Bidirectional d. Multidirectional 35 / 56 35. Commercial power supplies have voltage regulation …………. a. of 15% b. of 25% c. of 10% d. within 1% 36 / 56 36. How many diodes does bridge full-wave rectifier consists a. Two b. One c. Three d. Four 37 / 56 37. Regulated power supplies are used in .................. a. Computers b. Mobile chargers c. Measurement devices d. All of the above 38 / 56 38. The input voltage range of linear power supply is around a. ±30% b. ±40% c. ±10% d. ±50% 39 / 56 39. The noise of the switching DC power supply is a. 100mv-200mv b. 50mv-200mv c. 60mv-200mv d. 70mv-200mv 40 / 56 40. The hold-up time of linear power supply is around a. 1ms-2ms b. 20ms-30ms c. 10ms-20ms d. None of the above 41 / 56 41. The ripple factor of the center tapped full-wave rectifier is a. 100% b. 110% c. 48% d. 10% 42 / 56 42. The efficiency of linear power supply is around a. 30-40% b. 15-20% c. 20-30% d. 10-20% 43 / 56 43. If the load current drawn by unregulated power supply increases, the d.c. output voltage ……… a. None of the above b. Stays the same c. Decreases d. Increases 44 / 56 44. In switch-mode power supply the regulation of voltage is done by controlling a. None of the above b. Voltage range c. Duty cycle d. Both a and b 45 / 56 45. Rectification can be done by using a. Conductors b. Bridge rectifiers c. Transformers d. None of the above 46 / 56 46. How many diodes does the center tapped full wave rectifier consists of? a. One b. Two c. Five d. Six 47 / 56 47. A Zener regulator …………… in the power supply a. Neither increases nor decreases the ripple b. Data insufficient c. Increases the ripple d. Decreases the ripple 48 / 56 48. How many diodes does half-wave rectifier consists of a. Six b. Five c. Three d. One 49 / 56 49. The advantages of linear DC power supply are a. Output transient response is fast b. Output noise is low c. Common mode noise current is low d. All of the above 50 / 56 50. If the load resistance decreases in a Zener regulator, then Zener current ……………. a. None of the above b. Stays the same c. Increases d. Decreases 51 / 56 51. In an unregulated power supply, if load current increases, the output voltage ……….. a. Increases b. None of the above c. Remains the same d. Decreases 52 / 56 52. The ripple factor of half-wave rectifier is a. 10% b. 110% c. 100% d. 121% 53 / 56 53. The load regulation of the switching DC power supply is a. 0.1-1.0% b. 0.15-0.1% c. 0.10-0.1% d. 0.05-0.1% 54 / 56 54. When load current is zero, the Zener current will be ……… a. None of the above b. Zero c. Maximum d. Minimum 55 / 56 55. Zener diode can be used as ………… a. ac voltage regulator only b. dc voltage regulator only c. none of the above d. both d.c. and a.c. voltage regulator 56 / 56 56. The input linear filter is required in a. None of the above b. Linear power supply c. SMPS d. Both a and b Your score isThe average score is 23% LinkedIn Facebook Twitter VKontakte 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Share this