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