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