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 Share this 0% 0 votes, 0 avg Created on September 14, 2022DC Power supply Regulated DC power supply MCQ 1 / 56 1. The transient response of linear power supply is around a. 100µs b. 10µs c. 20µs d. 120µs 2 / 56 2. The rectifiers are categorized into a. One b. Four c. Three d. Two Half wave and Full wave rectifier 3 / 56 3. The load regulation of the switching DC power supply is a. 0.15-0.1% b. 0.10-0.1% c. 0.05-0.1% d. 0.1-1.0% 4 / 56 4. The diode is a _______ device a. Static b. Linear c. Dynamic d. Non-linear 5 / 56 5. How many diodes does bridge full-wave rectifier consists a. Two b. One c. Four d. Three 6 / 56 6. The maximum rectification efficiency of the center tapped full-wave rectifier is a. 10% b. 40% c. 81.2% d. 30% 7 / 56 7. The ripple factor of half-wave rectifier is a. 10% b. 110% c. 100% d. 121% 8 / 56 8. The unregulated power supply used in a. All of the above b. Relays c. Actuators d. Solenoids 9 / 56 9. The disadvantages of linear DC power supply are a. Efficiency is low b. All of the above c. Costly d. Large size 10 / 56 10. ..............rectifiers are full-wave rectifiers a. Center-tapped b. None of the above c. Both a and b d. Bridge 11 / 56 11. are the building blocks of regulated DC power supply a. Regulator b. Step down transformer c. Rectifier, DC filter d. All of the above 12 / 56 12. 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. 6V c. 2 V d. 7 V 13 / 56 13. filter is used to obtain DC voltage with some ripple a. RC filter b. None of the above c. Capacitor filter d. LC filter 14 / 56 14. 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 15 / 56 15. How many diodes does the center tapped full wave rectifier consists of? a. One b. Five c. Two d. Six 16 / 56 16. In a Zener voltage regulator, the changes in load current produce changes in ……………. a. Zener voltage b. None of the above c. Zener current d. Zener voltage as well as Zener current 17 / 56 17. Zener diode can be used as ………… a. dc voltage regulator only b. ac voltage regulator only c. none of the above d. both d.c. and a.c. voltage regulator 18 / 56 18. A power supply which has voltage regulation of ……….. is unregulated power supply a. 5 % b. 0 % c. 8% d. 10 % 19 / 56 19. The advantages of linear DC power supply are a. Output transient response is fast b. Output noise is low c. Common mode noise current is low d. All of the above 20 / 56 20. The efficiency of linear power supply is around a. 20-30% b. 15-20% c. 30-40% d. 10-20% 21 / 56 21. When load current is zero, the Zener current will be ……… a. None of the above b. Maximum c. Zero d. Minimum 22 / 56 22. How many types of regulated power supplies are there? a. One b. Four c. Two d. Three HintAdjustable voltage regulatorZener diode regulatorsCurrent limitersSeries regulators 23 / 56 23. The output voltage of a switch-mode power supply is a. More or less b. More c. very less d. Less 24 / 56 24. Two similar 15 V Zeners are connected in series. What is the regulated output voltage? a. 15 V b. 45 V c. 30 V d. 5 V 25 / 56 25. For increasing the voltage rating, zeners are connected in ………….. a. None of the above b. Parallel c. Series d. Series-parallel 26 / 56 26. A Zener regulator …………… in the power supply a. Data insufficient b. Increases the ripple c. Neither increases nor decreases the ripple d. Decreases the ripple 27 / 56 27. In switch-mode power supply the regulation of voltage is done by controlling a. Duty cycle b. Both a and b c. Voltage range d. None of the above 28 / 56 28. 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 29 / 56 29. The input linear filter is required in a. Both a and b b. SMPS c. Linear power supply d. None of the above 30 / 56 30. 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 31 / 56 31. The maximum rectification efficiency of half-wave rectifier is around a. 20% b. 30% c. 10% d. 40% 32 / 56 32. 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 33 / 56 33. Commercial power supplies have voltage regulation …………. a. of 10% b. within 1% c. of 15% d. of 25% 34 / 56 34. Regulated power supplies are used in .................. a. Mobile chargers b. Measurement devices c. All of the above d. Computers 35 / 56 35. The ripple factor of the center tapped full-wave rectifier is a. 100% b. 110% c. 10% d. 48% 36 / 56 36. The output obtained by the rectifier is a. Pulsating DC b. Pulsating AC c. Non-pulsating AC d. None 37 / 56 37. Which transformer increases the voltage? a. Step up b. None of the above c. Both a and b d. Step down 38 / 56 38. The rectification is a process of converting............. a. Alternating current or voltage into direct quantity b. Alternating current or voltage into direct quantity c. Alternating current into direct quantity d. Alternating voltage into direct quantity 39 / 56 39. The Zener current is maximum when the load current is a. zero b. infinity c. None of the above d. one 40 / 56 40. The AC component present in output voltage is called a. Non-linear regulators b. Ripple c. None d. Switching regulator 41 / 56 41. How many diodes does half-wave rectifier consists of a. Three b. Five c. Six d. One 42 / 56 42. The maximum rectification efficiency of bridge full-wave rectifier is around a. 30% b. 40% c. 81.2% d. 10% 43 / 56 43. The Zener current will be minimum when ………… a. Load current is maximum b. Load current is zero c. None of the above d. Load current is minimum 44 / 56 44. Rectification can be done by using a. None of the above b. Bridge rectifiers c. Conductors d. Transformers 45 / 56 45. 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 46 / 56 46. The output of the rectification is ................ a. Bidirectional b. Unidirectional c. None of the above d. Multidirectional 47 / 56 47. 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 48 / 56 48. 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 49 / 56 49. The input voltage range of linear power supply is around a. ±30% b. ±10% c. ±50% d. ±40% 50 / 56 50. 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 51 / 56 51. Which filter reduces the ripple? a. RC filter b. Capacitor filter c. None of the above d. LC filter 52 / 56 52. The noise of the switching DC power supply is a. 100mv-200mv b. 50mv-200mv c. 70mv-200mv d. 60mv-200mv 53 / 56 53. The switch-mode power supply categorized into a. Six b. Four c. One d. Three AC in DC ourtDC in DC outDC in AC outAC in AC out 54 / 56 54. An ideal regulated power supply is one which has voltage regulation of ………… a. 1% b. 10% c. 0% d. 5% 55 / 56 55. The hold-up time of linear power supply is around a. 20ms-30ms b. 1ms-2ms c. 10ms-20ms d. None of the above 56 / 56 56. allows DC but it blocks AC a. Insulator b. None c. Conductor d. Inductor Your score is The average score is 18% LinkedIn Facebook Twitter VKontakte 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Share this