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