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