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