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