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