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