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