mcq on voltage regulator and power supply

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DC Power supply

Regulated DC power supply MCQ

dc power supply mcq

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1. A regulated DC power supply is also known as

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2. filter is used to obtain DC voltage with some ripple

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3. The rectifiers are categorized into

Half wave and Full wave rectifier

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4. The switch-mode power supply categorized into

  1. AC in DC ourt
  2. DC in DC out
  3. DC in AC out
  4. AC in AC out

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5. In an unregulated power supply, if input a.c. voltage increases, the output voltage …….

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6. If the load current drawn by unregulated power supply increases, the d.c. output voltage ………

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7. The Zener current is maximum when the load current is

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8.  If the load resistance decreases in a Zener regulator, then Zener current …………….

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9. A power supply has a voltage regulation of 1%. If the no-load  voltage is 20 V, what is the full-load voltage?

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10. Which filter reduces the ripple?

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11. The input linear filter is required in

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12. are the building blocks of regulated DC power supply

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13. The input voltage range of linear power supply is around

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14. The maximum rectification efficiency of half-wave rectifier is around

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15. How many diodes does bridge full-wave rectifier consists

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16. Two similar 15 V Zeners are connected in series. What is the regulated output voltage?

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17. Output of a phase splitter is

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18. The noise of the switching DC power supply is 

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19. The maximum rectification efficiency of bridge full-wave rectifier is around

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20. An ideal regulated power supply is one which has voltage regulation of …………

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21. The disadvantages of linear DC power supply are

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22. In a Zener voltage regulator, the changes in load current produce changes in …………….

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23. The output voltage of a switch-mode power supply is

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24. A power supply which has voltage regulation of ……….. is unregulated power supply

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25. Rectification can be done by using 

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26. For increasing the voltage rating, zeners are connected in …………..

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27. The efficiency of linear power supply is around

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28. The output obtained by the rectifier is

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29. The advantages of linear DC power supply are

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30. Zener diode can be used as …………

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31. ..............rectifiers are full-wave rectifiers 

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32. The hold-up time of linear power supply is around

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33. How many diodes does the center tapped full wave rectifier consists of?

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34. The rectification is a process of converting.............

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35. The output of the rectification is ................

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36. The unregulated power supply used in 

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37. How many diodes does half-wave rectifier consists of

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38. The ripple factor of the center tapped full-wave rectifier is

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39. The Zener current will be minimum when …………

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40. A Zener regulator …………… in the power supply

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41.

Which transformer increases the voltage?

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42. Commercial power supplies have voltage regulation ………….

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43. The AC component present in output voltage is called

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44. The load regulation of the switching DC power supply is

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45. In switch-mode power supply the regulation of voltage is done by controlling

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46. The diode is a _______ device

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47. The ripple factor of half-wave rectifier is

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48. If the load current drawn by unregulated power supply increases, the d.c. output voltage ………..

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49. allows DC but it blocks AC

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50. Regulated power supplies are used in ..................

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51. The maximum rectification efficiency of the center tapped full-wave rectifier is

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52. When load current is zero, the Zener current will be ………

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53. Which transformer is used in a regulated DC power supply?

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54. How many types of regulated power supplies are there?

Hint

  1. Adjustable voltage regulator
  2. Zener diode regulators
  3. Current limiters
  4. Series regulators

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55. The transient response of linear power supply is around

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56. In an unregulated power supply, if load current increases, the output voltage ………..

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