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