This article lists 80+ Regulated DC Power Supply MCQs for engineering students. All the Regulated DC Power Supply Questions & Answers given below includes solution and link wherever possible to the relevant topic.
A regulated power supply is an embedded circuit that converts unregulated AC voltage or current to a constant DC. A regulated power supply is also called a linear power supply. A step-down transformer, rectifier, DC filter, regulator are the basic building blocks of regulated DC power supply.
The blocks that regulated the DC power supply consist of filter and rectifier circuit, transformer, and voltage regulator circuit. The fixed voltage regulators have three terminals they are input, output, and ground terminals. Both fixed and adjustable voltage regulators are three-terminal fixed voltage regulators.
The IC voltage regulator, Zener diode, SMPS, and transistorized series are the commonly used type of voltage regulators. The advantages of linear power supplies are they have low noise levels, they are reliable and simple, and the cost is low.
The linear regulated power supply and switching mode power supply are the categories of power supplies. The efficiency of unregulated power supplies is 90-95% and the ripple (RMS) is between 0.5V to 5V. The regulated power supply is used in DC motors, relays, and actuators. The unregulated power supply is used in television, computers, and mobile chargers.
1). Regulated power supplies are used in __________
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2). The silicon-controlled rectifiers are __________ devices
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3). The silicon-controlled rectifier is a _______ triggered device
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4). The controlling element of silicon-controlled rectifier is __________
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5). The voltage regulator output impedance is _______
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6). The Zener current is maximum when the load current is ___________
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7). The Zener diode made of _______
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8). The regulated DC power supply also called ________
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9). ______ are the building blocks of regulated DC power supply
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10). The rectification is a process of converting ________
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11). Rectification can be done by using ______
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12). The output of the rectification is ______
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13). The unregulated power supply used in ______
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14). How many types of regulated power supplies are there?
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15). The advantages of the traditional switching DC power supply are _____
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16). The disadvantages of the traditional switching DC power supply are _____
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17). The high-performance switching direct current power supply are ________
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18). The advantages of linear DC power supply are __________
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19). The disadvantages of linear DC power supply are __________
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20). The efficiency of linear power supply is around ______
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21). The switch-mode power supply is around ______
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22). The output voltage of a switch-mode power supply is _________
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23). The output voltage of linear power supply is ________
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24). The circuits are ________ in switch-mode power supply
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25). In switch-mode power supply the regulation of voltage is done by controlling _________
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Regulated DC Power Supply MCQs for Exams
26). The noise and interference in switch-mode power supply is _______
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27). The noise and interference in a linear power supply is _______
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28). The line regulation of linear power supply is around _____
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29). The input voltage range of linear power supply is around _______
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30). The noise of the linear power supply is around __________
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31). The transient response of linear power supply is around __________
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32). The input linear filter is required in _______
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33). The hold-up time of linear power supply is around _______
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34). The temperature of the linear power supply is around ________
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35). The linear power supply used in __________
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36). The switching power supply used in _______
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37). The source of supply is _______ in DC power supplies
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38). An operational amplifier can be used as a _________
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39). The ________ is not a Zener diode standard value
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40). The diode is a _______ device
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41). The rectifiers are categorized into _______
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42). ____________ rectifiers are full-wave rectifiers
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43). Which transformer is used in a regulated DC power supply?
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44). How many diodes does bridge full-wave rectifier consists?
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45). The maximum rectification efficiency of half-wave rectifier is around ________
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46). The maximum rectification efficiency of bridge full-wave rectifier is around ________
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47). The maximum rectification efficiency of the center tapped full-wave rectifier is around ________
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48). The line regulation of the switching DC power supply is _________
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49). The load regulation of the switching DC power supply is _________
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50). The input voltage range of the switching DC power supply is _________
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Regulated DC Power Supply MCQs for Interviews
51). The noise of the switching DC power supply is _________
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52). The transient response of the switching DC power supply is _________
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53). The hold-up time of the switching DC power supply is _________
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54). The ripple factor of half-wave rectifier is ______
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55). The ripple factor of the center tapped full-wave rectifier is __________
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56). How many diodes does the center tapped full wave rectifier consists of?
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57). How many diodes does half-wave rectifier consists of?
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58). Which transformer increases the voltage?
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59). Which filter reduces the ripple?
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60). The switch-mode power supply categorized into __________
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61). __________ filter is used to obtain DC voltage with some ripple
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62). _________ reduces the electric current
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63). __________ rectifier rectifies only half cycle of AC
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64). The voltage regulators has _______
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65). The Zener diodes cannot be used in __________
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66). The switch-mode power supply has a _________ generator circuit
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67). The power supply unit is used to __________ the power to circuits
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68). In half-wave rectifier during the positive cycle of the input signal, the diode is _______
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69). In half-wave rectifier the diode act as a close switch in ________ cycle operation
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70). In ____________ operation in diode in half-wave rectifier acts as a open switch
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71). In a bridge rectifier, the diode 1 and diode 2 are forward biased and the diode 3 and diode 4 are reverse biased in ________
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72). In a bridge rectifier, diode 1 and diode 2 are reverse biased and diode 3 and diode 4 are forward biased in ________
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73). The transient recovery of typical switching power supply is around _________
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74). The transient recovery of typical linear power supply is around _________
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75). The output ripple of the typical switching power supply is around __________
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Regulated DC Power Supply MCQs for Students
76). The output ripple of the typical linear power supply is around __________
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77). ________ are the examples of filter capacitor
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78). ______ are the examples of AC-DC power supplies
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79). The output obtained by the rectifier is ________
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80). The AC component present in output voltage is called _________
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81). The breakdown is another name for _______ diode
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82). The reactance of an inductor is given as ___________
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83). ___________ allows DC but it blocks AC
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84). The reactance of a capacitor is given as ___________
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85). The capacitor reactance is infinity when the frequency is _______
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86). In breakdown region ________ diode acts like battery
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87). There are _______ main designs for DC power supplies
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88). Which one is a switching DC power supply?
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89). The switching DC power supplies regulate output voltage through a process known as ________
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90). The linear power supplies are __________
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91). How many blocks does SMPS have?
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92). Which one is a linear DC power supply?
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93). When load current is maximum the Zener current is _______
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94). The Zener current is ________ when the load current is zero
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95). The Zener regulator _________ the ripple in power supply?
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96). For small load current the ___________ regulators are used
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97). Zener diode can be used as both ___________ regulator
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98). For filter circuit _________ are used
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99). The regulated power supply converts unregulated AC into __________
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100). The load regulation of linear power supply is around _____
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