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