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