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