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