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