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 Share this 0% 0 votes, 0 avg Created on September 14, 2022DC Power supply Regulated DC power supply MCQ 1 / 56 1. Rectification can be done by using a. Transformers b. Bridge rectifiers c. None of the above d. Conductors 2 / 56 2. How many diodes does bridge full-wave rectifier consists a. One b. Three c. Two d. Four 3 / 56 3. The rectifiers are categorized into a. Two b. Four c. One d. Three Half wave and Full wave rectifier 4 / 56 4. 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 5 / 56 5. The rectification is a process of converting............. a. Alternating current or voltage into direct quantity b. Alternating current into direct quantity c. Alternating current or voltage into direct quantity d. Alternating voltage into direct quantity 6 / 56 6. Output of a phase splitter is a. a pair of sine waves of equal amplitudes b. a pair of sine waves of unequal amplitudes and opposite phase c. a pair of sine waves of equal amplitudes and opposite phase d. a pair of sine waves of unequal amplitude 7 / 56 7. Zener diode can be used as ………… a. both d.c. and a.c. voltage regulator b. dc voltage regulator only c. ac voltage regulator only d. none of the above 8 / 56 8. 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% 9 / 56 9. For increasing the voltage rating, zeners are connected in ………….. a. Series b. Series-parallel c. None of the above d. Parallel 10 / 56 10. In a Zener voltage regulator, the changes in load current produce changes in ……………. a. Zener voltage as well as Zener current b. None of the above c. Zener voltage d. Zener current 11 / 56 11. The Zener current is maximum when the load current is a. infinity b. None of the above c. one d. zero 12 / 56 12. A regulated DC power supply is also known as a. hyper power supply b. linear power supply c. None of the above d. dual power supply 13 / 56 13. Commercial power supplies have voltage regulation …………. a. within 1% b. of 15% c. of 10% d. of 25% 14 / 56 14. A power supply has a voltage regulation of 1%. If the no-load voltage is 20 V, what is the full-load voltage? a. 2 V b. 7 V c. 8 V d. 6V 15 / 56 15. The output of the rectification is ................ a. Multidirectional b. None of the above c. Bidirectional d. Unidirectional 16 / 56 16. The disadvantages of linear DC power supply are a. Efficiency is low b. Large size c. Costly d. All of the above 17 / 56 17. The output obtained by the rectifier is a. Pulsating AC b. None c. Non-pulsating AC d. Pulsating DC 18 / 56 18. The maximum rectification efficiency of half-wave rectifier is around a. 10% b. 20% c. 40% d. 30% 19 / 56 19. The ripple factor of half-wave rectifier is a. 100% b. 10% c. 121% d. 110% 20 / 56 20. The input voltage range of linear power supply is around a. ±40% b. ±50% c. ±10% d. ±30% 21 / 56 21. The Zener current will be minimum when ………… a. Load current is minimum b. None of the above c. Load current is zero d. Load current is maximum 22 / 56 22. The efficiency of linear power supply is around a. 10-20% b. 15-20% c. 20-30% d. 30-40% 23 / 56 23. The output voltage of a switch-mode power supply is a. More b. More or less c. Less d. very less 24 / 56 24. A Zener regulator …………… in the power supply a. Decreases the ripple b. Neither increases nor decreases the ripple c. Data insufficient d. Increases the ripple 25 / 56 25. Two similar 15 V Zeners are connected in series. What is the regulated output voltage? a. 15 V b. 30 V c. 45 V d. 5 V 26 / 56 26. The switch-mode power supply categorized into a. One b. Three c. Four d. Six HintAC in DC outDC in DC outDC in AC outAC in AC out 27 / 56 27. are the building blocks of regulated DC power supply a. Regulator b. Rectifier, DC filter c. All of the above d. Step down transformer 28 / 56 28. An ideal regulated power supply is one which has voltage regulation of ………… a. 0% b. 1% c. 10% d. 5% 29 / 56 29. The diode is a _______ device a. Dynamic b. Linear c. Static d. Non-linear 30 / 56 30. The noise of the switching DC power supply is a. 70mv-200mv b. 50mv-200mv c. 100mv-200mv d. 60mv-200mv 31 / 56 31. Which filter reduces the ripple? a. Capacitor filter b. LC filter c. None of the above d. RC filter 32 / 56 32. Which transformer increases the voltage? a. Both a and b b. None of the above c. Step down d. Step up 33 / 56 33. How many diodes does half-wave rectifier consists of a. Six b. Three c. Five d. One 34 / 56 34. The advantages of linear DC power supply are a. Output noise is low b. Output transient response is fast c. Common mode noise current is low d. All of the above 35 / 56 35. filter is used to obtain DC voltage with some ripple a. LC filter b. Capacitor filter c. None of the above d. RC filter 36 / 56 36. ..............rectifiers are full-wave rectifiers a. Both a and b b. Bridge c. Center-tapped d. None of the above 37 / 56 37. In an unregulated power supply, if load current increases, the output voltage ……….. a. Remains the same b. None of the above c. Increases d. Decreases 38 / 56 38. 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 39 / 56 39. Which transformer is used in a regulated DC power supply? a. None of the above b. Step up c. Both a or b d. Step down 40 / 56 40. The ripple factor of the center tapped full-wave rectifier is a. 48% b. 100% c. 110% d. 10% 41 / 56 41. The transient response of linear power supply is around a. 120µs b. 100µs c. 10µs d. 20µs 42 / 56 42. 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 43 / 56 43. A power supply which has voltage regulation of ……….. is unregulated power supply a. 5 % b. 10 % c. 0 % d. 8% 44 / 56 44. How many diodes does the center tapped full wave rectifier consists of? a. Five b. Two c. One d. Six 45 / 56 45. The input linear filter is required in a. SMPS b. Both a and b c. None of the above d. Linear power supply 46 / 56 46. allows DC but it blocks AC a. Conductor b. Insulator c. Inductor d. None 47 / 56 47. Regulated power supplies are used in .................. a. Measurement devices b. Computers c. All of the above d. Mobile chargers 48 / 56 48. The maximum rectification efficiency of the center tapped full-wave rectifier is a. 10% b. 81.2% c. 40% d. 30% 49 / 56 49. The unregulated power supply used in a. Actuators b. Relays c. All of the above d. Solenoids 50 / 56 50. When load current is zero, the Zener current will be ……… a. Maximum b. Zero c. None of the above d. Minimum 51 / 56 51. In an unregulated power supply, if input a.c. voltage increases, the output voltage ……. a. Increases b. None of the above c. Decreases d. Remains the same 52 / 56 52. The hold-up time of linear power supply is around a. 20ms-30ms b. 1ms-2ms c. 10ms-20ms d. None of the above 53 / 56 53. The AC component present in output voltage is called a. Switching regulator b. None c. Ripple d. Non-linear regulators 54 / 56 54. How many types of regulated power supplies are there? a. Two b. Three c. Four d. One HintAdjustable voltage regulatorZener diode regulatorsCurrent limitersSeries regulators 55 / 56 55. 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. Increases d. Decreases 56 / 56 56. The maximum rectification efficiency of bridge full-wave rectifier is around a. 10% b. 40% c. 30% d. 81.2% Your score isThe average score is 25% LinkedIn Facebook Twitter VKontakte 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Share this