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