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. If the load resistance decreases in a Zener regulator, then Zener current ……………. a. Stays the same b. Increases c. Decreases d. None of the above 2 / 56 2. The output voltage of a switch-mode power supply is a. More or less b. More c. very less d. Less 3 / 56 3. ..............rectifiers are full-wave rectifiers a. Center-tapped b. Both a and b c. None of the above d. Bridge 4 / 56 4. The rectifiers are categorized into a. Two b. Three c. Four d. One Half wave and Full wave rectifier 5 / 56 5. The unregulated power supply used in a. All of the above b. Actuators c. Solenoids d. Relays 6 / 56 6. The hold-up time of linear power supply is around a. 20ms-30ms b. 10ms-20ms c. 1ms-2ms d. None of the above 7 / 56 7. Which transformer is used in a regulated DC power supply? a. Step down b. Step up c. Both a or b d. None of the above 8 / 56 8. Output of a phase splitter is a. a pair of sine waves of equal amplitudes 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 unequal amplitude 9 / 56 9. An ideal regulated power supply is one which has voltage regulation of ………… a. 5% b. 1% c. 0% d. 10% 10 / 56 10. A regulated DC power supply is also known as a. linear power supply b. dual power supply c. hyper power supply d. None of the above 11 / 56 11. The Zener current is maximum when the load current is a. zero b. one c. None of the above d. infinity 12 / 56 12. 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 13 / 56 13. The load regulation of the switching DC power supply is a. 0.1-1.0% b. 0.05-0.1% c. 0.15-0.1% d. 0.10-0.1% 14 / 56 14. The output of the rectification is ................ a. Multidirectional b. Bidirectional c. None of the above d. Unidirectional 15 / 56 15. 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 16 / 56 16. 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 17 / 56 17. filter is used to obtain DC voltage with some ripple a. None of the above b. Capacitor filter c. RC filter d. LC filter 18 / 56 18. How many diodes does the center tapped full wave rectifier consists of? a. One b. Six c. Five d. Two 19 / 56 19. The maximum rectification efficiency of half-wave rectifier is around a. 10% b. 20% c. 30% d. 40% 20 / 56 20. If the load current drawn by unregulated power supply increases, the d.c. output voltage ……… a. Increases b. Decreases c. None of the above d. Stays the same 21 / 56 21. The input voltage range of linear power supply is around a. ±30% b. ±50% c. ±10% d. ±40% 22 / 56 22. The output obtained by the rectifier is a. Pulsating AC b. Pulsating DC c. None d. Non-pulsating AC 23 / 56 23. A power supply which has voltage regulation of ……….. is unregulated power supply a. 10 % b. 0 % c. 5 % d. 8% 24 / 56 24. Regulated power supplies are used in .................. a. Computers b. All of the above c. Mobile chargers d. Measurement devices 25 / 56 25. The input linear filter is required in a. None of the above b. Both a and b c. Linear power supply d. SMPS 26 / 56 26. allows DC but it blocks AC a. None b. Conductor c. Insulator d. Inductor 27 / 56 27. A Zener regulator …………… in the power supply a. Increases the ripple b. Decreases the ripple c. Data insufficient d. Neither increases nor decreases the ripple 28 / 56 28. How many diodes does half-wave rectifier consists of a. One b. Three c. Six d. Five 29 / 56 29. A power supply has a voltage regulation of 1%. If the no-load voltage is 20 V, what is the full-load voltage? a. 8 V b. 7 V c. 6V d. 2 V 30 / 56 30. When load current is zero, the Zener current will be ……… a. Zero b. Maximum c. Minimum d. None of the above 31 / 56 31. The maximum rectification efficiency of bridge full-wave rectifier is around a. 30% b. 40% c. 81.2% d. 10% 32 / 56 32. For increasing the voltage rating, zeners are connected in ………….. a. Parallel b. Series c. None of the above d. Series-parallel 33 / 56 33. The efficiency of linear power supply is around a. 15-20% b. 30-40% c. 10-20% d. 20-30% 34 / 56 34. The ripple factor of the center tapped full-wave rectifier is a. 100% b. 48% c. 10% d. 110% 35 / 56 35. 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 36 / 56 36. are the building blocks of regulated DC power supply a. Rectifier, DC filter b. All of the above c. Regulator d. Step down transformer 37 / 56 37. The disadvantages of linear DC power supply are a. All of the above b. Large size c. Costly d. Efficiency is low 38 / 56 38. The ripple factor of half-wave rectifier is a. 10% b. 121% c. 110% d. 100% 39 / 56 39. The noise of the switching DC power supply is a. 70mv-200mv b. 60mv-200mv c. 50mv-200mv d. 100mv-200mv 40 / 56 40. In an unregulated power supply, if input a.c. voltage increases, the output voltage ……. a. Decreases b. Remains the same c. None of the above d. Increases 41 / 56 41. Which filter reduces the ripple? a. RC filter b. Capacitor filter c. LC filter d. None of the above 42 / 56 42. Commercial power supplies have voltage regulation …………. a. of 25% b. of 10% c. of 15% d. within 1% 43 / 56 43. How many diodes does bridge full-wave rectifier consists a. One b. Three c. Four d. Two 44 / 56 44. The rectification is a process of converting............. a. Alternating current into direct quantity b. Alternating current or voltage into direct quantity c. Alternating current or voltage into direct quantity d. Alternating voltage into direct quantity 45 / 56 45. In switch-mode power supply the regulation of voltage is done by controlling a. Duty cycle b. None of the above c. Voltage range d. Both a and b 46 / 56 46. The transient response of linear power supply is around a. 10µs b. 120µs c. 20µs d. 100µs 47 / 56 47. 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 48 / 56 48. The diode is a _______ device a. Dynamic b. Static c. Non-linear d. Linear 49 / 56 49. Two similar 15 V Zeners are connected in series. What is the regulated output voltage? a. 15 V b. 45 V c. 5 V d. 30 V 50 / 56 50. 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 51 / 56 51. Rectification can be done by using a. None of the above b. Transformers c. Bridge rectifiers d. Conductors 52 / 56 52. Which transformer increases the voltage? a. Both a and b b. Step down c. Step up d. None of the above 53 / 56 53. The AC component present in output voltage is called a. Ripple b. None c. Switching regulator d. Non-linear regulators 54 / 56 54. If the load current drawn by unregulated power supply increases, the d.c. output voltage ……….. a. Decreases b. Stays the same c. Increases d. None of the above 55 / 56 55. The maximum rectification efficiency of the center tapped full-wave rectifier is a. 40% b. 10% c. 81.2% d. 30% 56 / 56 56. The Zener current will be minimum when ………… a. Load current is minimum b. Load current is maximum c. Load current is zero d. None of the above Your score isThe average score is 24% LinkedIn Facebook VKontakte 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Spread the love
