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