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