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. filter is used to obtain DC voltage with some ripple a. LC filter b. None of the above c. RC filter d. Capacitor filter 2 / 56 2. The efficiency of linear power supply is around a. 20-30% b. 10-20% c. 30-40% d. 15-20% 3 / 56 3. The switch-mode power supply categorized into a. One b. Six c. Four d. Three Hint AC in DC out DC in DC out DC in AC out AC in AC out 4 / 56 4. The output obtained by the rectifier is a. Non-pulsating AC b. Pulsating DC c. None d. Pulsating AC 5 / 56 5. The noise of the switching DC power supply is a. 50mv-200mv b. 100mv-200mv c. 70mv-200mv d. 60mv-200mv 6 / 56 6. Rectification can be done by using a. None of the above b. Conductors c. Bridge rectifiers d. Transformers 7 / 56 7. A power supply which has voltage regulation of ……….. is unregulated power supply a. 10 % b. 5 % c. 0 % d. 8% 8 / 56 8. The maximum rectification efficiency of the center tapped full-wave rectifier is a. 40% b. 30% c. 81.2% d. 10% 9 / 56 9. How many types of regulated power supplies are there? a. Four b. One c. Three d. Two Hint Adjustable voltage regulator Zener diode regulators Current limiters Series regulators 10 / 56 10. 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 11 / 56 11. are the building blocks of regulated DC power supply a. Regulator b. All of the above c. Rectifier, DC filter d. Step down transformer 12 / 56 12. The advantages of linear DC power supply are a. Output noise is low b. All of the above c. Common mode noise current is low d. Output transient response is fast 13 / 56 13. The input linear filter is required in a. Both a and b b. Linear power supply c. SMPS d. None of the above 14 / 56 14. The transient response of linear power supply is around a. 20µs b. 120µs c. 100µs d. 10µs 15 / 56 15. The maximum rectification efficiency of bridge full-wave rectifier is around a. 40% b. 10% c. 81.2% d. 30% 16 / 56 16. How many diodes does bridge full-wave rectifier consists a. One b. Two c. Four d. Three 17 / 56 17. The output voltage of a switch-mode power supply is a. very less b. More c. Less d. More or less 18 / 56 18. Which transformer increases the voltage? a. Both a and b b. Step down c. Step up d. None of the above 19 / 56 19. The ripple factor of the center tapped full-wave rectifier is a. 100% b. 10% c. 48% d. 110% 20 / 56 20. The load regulation of the switching DC power supply is a. 0.1-1.0% b. 0.15-0.1% c. 0.10-0.1% d. 0.05-0.1% 21 / 56 21. How many diodes does the center tapped full wave rectifier consists of? a. One b. Five c. Two d. Six 22 / 56 22. Zener diode can be used as ………… a. both d.c. and a.c. voltage regulator b. none of the above c. ac voltage regulator only d. dc voltage regulator only 23 / 56 23. When load current is zero, the Zener current will be ……… a. Maximum b. Zero c. Minimum d. None of the above 24 / 56 24. The ripple factor of half-wave rectifier is a. 100% b. 121% c. 110% d. 10% 25 / 56 25. For increasing the voltage rating, zeners are connected in ………….. a. Parallel b. None of the above c. Series-parallel d. Series 26 / 56 26. In a Zener voltage regulator, the changes in load current produce changes in ……………. a. None of the above b. Zener voltage as well as Zener current c. Zener current d. Zener voltage 27 / 56 27. The maximum rectification efficiency of half-wave rectifier is around a. 40% b. 20% c. 10% d. 30% 28 / 56 28. In an unregulated power supply, if input a.c. voltage increases, the output voltage ……. a. Decreases b. None of the above c. Remains the same d. Increases 29 / 56 29. The rectification is a process of converting............. a. Alternating current or voltage into direct quantity b. Alternating voltage into direct quantity c. Alternating current or voltage into direct quantity d. Alternating current into direct quantity 30 / 56 30. In an unregulated power supply, if load current increases, the output voltage ……….. a. Increases b. None of the above c. Decreases d. Remains the same 31 / 56 31. The input voltage range of linear power supply is around a. ±40% b. ±50% c. ±10% d. ±30% 32 / 56 32. The AC component present in output voltage is called a. Ripple b. None c. Non-linear regulators d. Switching regulator 33 / 56 33. Commercial power supplies have voltage regulation …………. a. of 25% b. of 15% c. within 1% d. of 10% 34 / 56 34. Which transformer is used in a regulated DC power supply? a. None of the above b. Both a or b c. Step up d. Step down 35 / 56 35. The rectifiers are categorized into a. Four b. Three c. One d. Two Half wave and Full wave rectifier 36 / 56 36. The unregulated power supply used in a. Solenoids b. All of the above c. Actuators d. Relays 37 / 56 37. Output of a phase splitter is a. a pair of sine waves of unequal amplitude b. a pair of sine waves of equal amplitudes and opposite phase c. a pair of sine waves of unequal amplitudes and opposite phase d. a pair of sine waves of equal amplitudes 38 / 56 38. The disadvantages of linear DC power supply are a. All of the above b. Efficiency is low c. Costly d. Large size 39 / 56 39. The output of the rectification is ................ a. None of the above b. Bidirectional c. Multidirectional d. Unidirectional 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. 2 V b. 8 V c. 6V d. 7 V 41 / 56 41. ..............rectifiers are full-wave rectifiers a. Bridge b. None of the above c. Both a and b d. Center-tapped 42 / 56 42. In switch-mode power supply the regulation of voltage is done by controlling a. Duty cycle b. None of the above c. Both a and b d. Voltage range 43 / 56 43. The diode is a _______ device a. Linear b. Non-linear c. Dynamic d. Static 44 / 56 44. An ideal regulated power supply is one which has voltage regulation of ………… a. 5% b. 0% c. 10% d. 1% 45 / 56 45. If the load resistance decreases in a Zener regulator, then Zener current ……………. a. Increases b. Decreases c. None of the above d. Stays the same 46 / 56 46. The Zener current will be minimum when ………… a. Load current is minimum b. Load current is zero c. None of the above d. Load current is maximum 47 / 56 47. How many diodes does half-wave rectifier consists of a. Six b. Three c. One d. Five 48 / 56 48. Regulated power supplies are used in .................. a. Mobile chargers b. Measurement devices c. All of the above d. Computers 49 / 56 49. Which filter reduces the ripple? a. LC filter b. Capacitor filter c. None of the above d. RC filter 50 / 56 50. The hold-up time of linear power supply is around a. None of the above b. 20ms-30ms c. 1ms-2ms d. 10ms-20ms 51 / 56 51. allows DC but it blocks AC a. Insulator b. None c. Conductor d. Inductor 52 / 56 52. The Zener current is maximum when the load current is a. None of the above b. one c. zero d. infinity 53 / 56 53. If the load current drawn by unregulated power supply increases, the d.c. output voltage ……… a. Increases b. None of the above c. Stays the same d. Decreases 54 / 56 54. 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 55 / 56 55. Two similar 15 V Zeners are connected in series. What is the regulated output voltage? a. 15 V b. 5 V c. 30 V d. 45 V 56 / 56 56. A regulated DC power supply is also known as a. None of the above b. dual power supply c. linear power supply d. hyper power supply Your score isThe average score is 24% LinkedIn Facebook VKontakte 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Spread the love
