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