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 up b. Step down c. None of the above d. Both a and b 2 / 56 2. filter is used to obtain DC voltage with some ripple a. RC filter b. None of the above c. LC filter d. Capacitor filter 3 / 56 3. The output obtained by the rectifier is a. Non-pulsating AC b. Pulsating DC c. None d. Pulsating AC 4 / 56 4. The diode is a _______ device a. Linear b. Static c. Dynamic d. Non-linear 5 / 56 5. Output of a phase splitter is a. a pair of sine waves of unequal amplitude b. a pair of sine waves of equal amplitudes c. a pair of sine waves of equal amplitudes and opposite phase d. a pair of sine waves of unequal amplitudes and opposite phase 6 / 56 6. The ripple factor of the center tapped full-wave rectifier is a. 100% b. 48% c. 110% d. 10% 7 / 56 7. Two similar 15 V Zeners are connected in series. What is the regulated output voltage? a. 30 V b. 15 V c. 5 V d. 45 V 8 / 56 8. The maximum rectification efficiency of half-wave rectifier is around a. 40% b. 30% c. 10% d. 20% 9 / 56 9. The AC component present in output voltage is called a. None b. Non-linear regulators c. Switching regulator d. Ripple 10 / 56 10. In a Zener voltage regulator, the changes in load current produce changes in ……………. a. Zener voltage b. Zener voltage as well as Zener current c. None of the above d. Zener current 11 / 56 11. 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. 2 V c. 8 V d. 6V 12 / 56 12. The input linear filter is required in a. Linear power supply b. Both a and b c. SMPS d. None of the above 13 / 56 13. The switch-mode power supply categorized into a. Three b. One c. Six d. Four HintAC in DC outDC in DC outDC in AC outAC in AC out 14 / 56 14. 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 15 / 56 15. The transient response of linear power supply is around a. 20µs b. 100µs c. 10µs d. 120µs 16 / 56 16. When load current is zero, the Zener current will be ……… a. Minimum b. Maximum c. None of the above d. Zero 17 / 56 17. The efficiency of linear power supply is around a. 15-20% b. 30-40% c. 20-30% d. 10-20% 18 / 56 18. 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 19 / 56 19. If the load resistance decreases in a Zener regulator, then Zener current ……………. a. Increases b. None of the above c. Decreases d. Stays the same 20 / 56 20. The unregulated power supply used in a. All of the above b. Actuators c. Solenoids d. Relays 21 / 56 21. How many diodes does the center tapped full wave rectifier consists of? a. Five b. Two c. Six d. One 22 / 56 22. The output of the rectification is ................ a. None of the above b. Unidirectional c. Bidirectional d. Multidirectional 23 / 56 23. ..............rectifiers are full-wave rectifiers a. None of the above b. Both a and b c. Bridge d. Center-tapped 24 / 56 24. A Zener regulator …………… in the power supply a. Data insufficient b. Increases the ripple c. Decreases the ripple d. Neither increases nor decreases the ripple 25 / 56 25. The ripple factor of half-wave rectifier is a. 10% b. 121% c. 100% d. 110% 26 / 56 26. Regulated power supplies are used in .................. a. Computers b. All of the above c. Measurement devices d. Mobile chargers 27 / 56 27. An ideal regulated power supply is one which has voltage regulation of ………… a. 5% b. 0% c. 1% d. 10% 28 / 56 28. The maximum rectification efficiency of the center tapped full-wave rectifier is a. 81.2% b. 30% c. 40% d. 10% 29 / 56 29. The load regulation of the switching DC power supply is a. 0.15-0.1% b. 0.1-1.0% c. 0.05-0.1% d. 0.10-0.1% 30 / 56 30. Zener diode can be used as ………… a. both d.c. and a.c. voltage regulator b. ac voltage regulator only c. none of the above d. dc voltage regulator only 31 / 56 31. How many diodes does half-wave rectifier consists of a. Five b. Six c. Three d. One 32 / 56 32. Rectification can be done by using a. None of the above b. Conductors c. Bridge rectifiers d. Transformers 33 / 56 33. A power supply which has voltage regulation of ……….. is unregulated power supply a. 10 % b. 8% c. 0 % d. 5 % 34 / 56 34. For increasing the voltage rating, zeners are connected in ………….. a. Parallel b. Series-parallel c. Series d. None of the above 35 / 56 35. The Zener current is maximum when the load current is a. zero b. None of the above c. infinity d. one 36 / 56 36. Which filter reduces the ripple? a. Capacitor filter b. LC filter c. RC filter d. None of the above 37 / 56 37. The advantages of linear DC power supply are a. Output transient response is fast b. Common mode noise current is low c. All of the above d. Output noise is low 38 / 56 38. How many diodes does bridge full-wave rectifier consists a. Four b. One c. Two d. Three 39 / 56 39. The noise of the switching DC power supply is a. 60mv-200mv b. 100mv-200mv c. 50mv-200mv d. 70mv-200mv 40 / 56 40. The input voltage range of linear power supply is around a. ±50% b. ±30% c. ±40% d. ±10% 41 / 56 41. allows DC but it blocks AC a. Inductor b. None c. Conductor d. Insulator 42 / 56 42. The hold-up time of linear power supply is around a. None of the above b. 1ms-2ms c. 20ms-30ms d. 10ms-20ms 43 / 56 43. A regulated DC power supply is also known as a. linear power supply b. hyper power supply c. None of the above d. dual power supply 44 / 56 44. Which transformer is used in a regulated DC power supply? a. Step up b. Both a or b c. None of the above d. Step down 45 / 56 45. How many types of regulated power supplies are there? a. Four b. Three c. Two d. One HintAdjustable voltage regulatorZener diode regulatorsCurrent limitersSeries regulators 46 / 56 46. In an unregulated power supply, if input a.c. voltage increases, the output voltage ……. a. Increases b. Remains the same c. None of the above d. Decreases 47 / 56 47. In an unregulated power supply, if load current increases, the output voltage ……….. a. Remains the same b. None of the above c. Increases d. Decreases 48 / 56 48. are the building blocks of regulated DC power supply a. Regulator b. All of the above c. Step down transformer d. Rectifier, DC filter 49 / 56 49. The maximum rectification efficiency of bridge full-wave rectifier is around a. 40% b. 30% c. 81.2% d. 10% 50 / 56 50. The disadvantages of linear DC power supply are a. Costly b. All of the above c. Efficiency is low d. Large size 51 / 56 51. If the load current drawn by unregulated power supply increases, the d.c. output voltage ……… a. Stays the same b. Decreases c. None of the above d. Increases 52 / 56 52. 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 53 / 56 53. Commercial power supplies have voltage regulation …………. a. of 25% b. within 1% c. of 15% d. of 10% 54 / 56 54. The output voltage of a switch-mode power supply is a. More b. More or less c. Less d. very less 55 / 56 55. In switch-mode power supply the regulation of voltage is done by controlling a. Duty cycle b. Both a and b c. None of the above d. Voltage range 56 / 56 56. The rectifiers are categorized into a. One b. Three c. Four d. Two Half wave and Full wave rectifier Your score isThe average score is 24% LinkedIn Facebook Twitter VKontakte 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Share this