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