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 AC component present in output voltage is called a. None b. Non-linear regulators c. Ripple d. Switching regulator 2 / 56 2. The noise of the switching DC power supply is a. 100mv-200mv b. 70mv-200mv c. 50mv-200mv d. 60mv-200mv 3 / 56 3. A regulated DC power supply is also known as a. None of the above b. linear power supply c. dual power supply d. hyper power supply 4 / 56 4. 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 5 / 56 5. Regulated power supplies are used in .................. a. Mobile chargers b. All of the above c. Measurement devices d. Computers 6 / 56 6. For increasing the voltage rating, zeners are connected in ………….. a. Series b. None of the above c. Series-parallel d. Parallel 7 / 56 7. In an unregulated power supply, if input a.c. voltage increases, the output voltage ……. a. Increases b. None of the above c. Remains the same d. Decreases 8 / 56 8. The Zener current will be minimum when ………… a. None of the above b. Load current is minimum c. Load current is maximum d. Load current is zero 9 / 56 9. The maximum rectification efficiency of bridge full-wave rectifier is around a. 81.2% b. 30% c. 40% d. 10% 10 / 56 10. The unregulated power supply used in a. All of the above b. Actuators c. Solenoids d. Relays 11 / 56 11. Zener diode can be used as ………… a. none of the above b. dc voltage regulator only c. both d.c. and a.c. voltage regulator d. ac voltage regulator only 12 / 56 12. The transient response of linear power supply is around a. 10µs b. 120µs c. 100µs d. 20µs 13 / 56 13. 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 14 / 56 14. The input linear filter is required in a. None of the above b. Linear power supply c. SMPS d. Both a and b 15 / 56 15. When load current is zero, the Zener current will be ……… a. Zero b. Minimum c. Maximum d. None of the above 16 / 56 16. The diode is a _______ device a. Static b. Dynamic c. Non-linear d. Linear 17 / 56 17. The output of the rectification is ................ a. Multidirectional b. Bidirectional c. None of the above d. Unidirectional 18 / 56 18. The load regulation of the switching DC power supply is a. 0.10-0.1% b. 0.05-0.1% c. 0.1-1.0% d. 0.15-0.1% 19 / 56 19. filter is used to obtain DC voltage with some ripple a. Capacitor filter b. RC filter c. LC filter d. None of the above 20 / 56 20. How many diodes does half-wave rectifier consists of a. Five b. Six c. One d. Three 21 / 56 21. If the load current drawn by unregulated power supply increases, the d.c. output voltage ……….. a. Decreases b. Increases c. Stays the same d. None of the above 22 / 56 22. ..............rectifiers are full-wave rectifiers a. None of the above b. Bridge c. Center-tapped d. Both a and b 23 / 56 23. Commercial power supplies have voltage regulation …………. a. of 25% b. within 1% c. of 10% d. of 15% 24 / 56 24. How many diodes does the center tapped full wave rectifier consists of? a. Five b. Six c. Two d. One 25 / 56 25. 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 amplitude d. a pair of sine waves of unequal amplitudes and opposite phase 26 / 56 26. 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 27 / 56 27. The Zener current is maximum when the load current is a. zero b. infinity c. one d. None of the above 28 / 56 28. How many diodes does bridge full-wave rectifier consists a. One b. Two c. Four d. Three 29 / 56 29. The maximum rectification efficiency of the center tapped full-wave rectifier is a. 10% b. 81.2% c. 30% d. 40% 30 / 56 30. are the building blocks of regulated DC power supply a. Regulator b. All of the above c. Step down transformer d. Rectifier, DC filter 31 / 56 31. The input voltage range of linear power supply is around a. ±10% b. ±50% c. ±30% d. ±40% 32 / 56 32. A power supply which has voltage regulation of ……….. is unregulated power supply a. 10 % b. 5 % c. 8% d. 0 % 33 / 56 33. The hold-up time of linear power supply is around a. 10ms-20ms b. None of the above c. 20ms-30ms d. 1ms-2ms 34 / 56 34. How many types of regulated power supplies are there? a. One b. Four c. Two d. Three HintAdjustable voltage regulatorZener diode regulatorsCurrent limitersSeries regulators 35 / 56 35. If the load resistance decreases in a Zener regulator, then Zener current ……………. a. None of the above b. Stays the same c. Increases d. Decreases 36 / 56 36. Rectification can be done by using a. Conductors b. Transformers c. Bridge rectifiers d. None of the above 37 / 56 37. The rectifiers are categorized into a. Two b. Three c. One d. Four Half wave and Full wave rectifier 38 / 56 38. The ripple factor of half-wave rectifier is a. 110% b. 100% c. 121% d. 10% 39 / 56 39. The disadvantages of linear DC power supply are a. Efficiency is low b. Costly c. All of the above d. Large size 40 / 56 40. The ripple factor of the center tapped full-wave rectifier is a. 48% b. 100% c. 110% d. 10% 41 / 56 41. The output obtained by the rectifier is a. None b. Non-pulsating AC c. Pulsating DC d. Pulsating AC 42 / 56 42. The output voltage of a switch-mode power supply is a. Less b. More or less c. More d. very less 43 / 56 43. 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. Decreases d. Increases 44 / 56 44. The efficiency of linear power supply is around a. 30-40% b. 20-30% c. 10-20% d. 15-20% 45 / 56 45. The advantages of linear DC power supply are a. Output noise is low b. Common mode noise current is low c. All of the above d. Output transient response is fast 46 / 56 46. The switch-mode power supply categorized into a. Three b. Six c. One d. Four HintAC in DC outDC in DC outDC in AC outAC in AC out 47 / 56 47. Which filter reduces the ripple? a. LC filter b. Capacitor filter c. None of the above d. RC filter 48 / 56 48. 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 49 / 56 49. Which transformer increases the voltage? a. Both a and b b. Step down c. Step up d. None of the above 50 / 56 50. An ideal regulated power supply is one which has voltage regulation of ………… a. 1% b. 5% c. 10% d. 0% 51 / 56 51. allows DC but it blocks AC a. Inductor b. Insulator c. None d. Conductor 52 / 56 52. In an unregulated power supply, if load current increases, the output voltage ……….. a. Remains the same b. Decreases c. None of the above d. Increases 53 / 56 53. The maximum rectification efficiency of half-wave rectifier is around a. 10% b. 30% c. 40% d. 20% 54 / 56 54. Which transformer is used in a regulated DC power supply? a. Step up b. Both a or b c. Step down d. None of the above 55 / 56 55. The rectification is a process of converting............. a. Alternating voltage into direct quantity b. Alternating current into direct quantity c. Alternating current or voltage into direct quantity d. Alternating current or voltage into direct quantity 56 / 56 56. Two similar 15 V Zeners are connected in series. What is the regulated output voltage? a. 45 V b. 5 V c. 30 V d. 15 V Your score isThe average score is 25% LinkedIn Facebook Twitter VKontakte 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Share this