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