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Multivibrator Question & Answers

August 4, 2021 By WatElectronics

This article lists 100 Multivibrator MCQs for engineering students. All the Multivibrator Questions & Answers given below includes solution and link wherever possible to the relevant topic.

A sequential logic circuit utilized in building up complex circuitry can be a Counter, Latch, and Memories. These circuits must be provided with a timing or clock signal to make them function sequentially. This type of Single Pulse Generator circuit is known as a Multivibrator.

Multivibrators are available in three types like astable, monostable, and bistable. The astable multivibrator has no stable states, so it switches continually from one condition to the other. So, it works like a relaxation oscillator.

In a monostable multivibrator, one of the states is stable whereas the other state is not stable. As the name suggests, a bistable multivibrator includes two stable states. Here, a separate trigger signal is necessary from one stable state to another stable state for the transition.

The applications of multivibrators mainly include; these can be used as saw tooth generators, frequency generators, pulse, and wave generators, used in tv and radar circuits, etc.

1). Multivibrators are also referred to as ______.

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2). Which feedback does a multivibrator have?

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3). What are the types of Multivibrators?

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4). Astable Multivibrators has ________ Stable states.

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5). Which multivibrators consist of One Stable state?

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6). What type of Multivibrator can produce only one Single pulse?

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7). How many states does a Bistable Multivibrator possess?

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8). What do you mean by Quasi stable?

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9). What are the elements used for coupling in Bistable Multivibrators?

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10). What type of multivibrator needs triggering for Reverse transition?

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11). Astable multivibrators can function as ______________.

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12). Which Multivibrator is known as Flip-flop Multivibrator?

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13). What are the other names of Bistable multivibrators?

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14). Monostable multivibrator is also known as ___________.

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15). Why the Monostable Multivibrator referred to as Delay circuit?

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16). Bistable Multivibrators is known as _________.

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17). How do Multivibrators differ from Oscillators?

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18). Why a Flip-flop Multivibrator is termed as Two-shot Multivibrator?

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19). How many trigger pulses required for Bistable multivibrators?

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20). Which of these multivibrator produces square wave as the outcome?

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21). Duty cycle of an Astable multivibrator is ________.

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22). What kind of multivibrators have equal time for a capacitor to charge and discharge?

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23). How many stages of amplifier present in Astable Multivibrator?

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24). Which is the feedback present in Astable multivibrators?

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25). Which of the below circuit has a Quasi stable state?

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Multivibrators Important Questions for Interviews

26). What does a symmetrically coupled collector circuit consists of?

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27). What happens to the signal when passed through Common-emitter amplifier’s first stage?

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28). Multivibrators output is collected from ___________ of any transistor.

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29). How the transistors Q1 and Q2 alternates in the multivibrator circuit?

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30). Total time period of the Square wave is ________.

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31). How the frequency can be determined for the oscillations?

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32). Which is known as Free-running Multivibrator?

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33). How frequency at the output can be varied in Astable multivibrator circuit?

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34). What is the main application of a Monostable multivibrator?

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35). What happens to the Monostable circuit when it is triggered externally?

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36). Monostable circuit from state of Quasi-stable will return to Stable by _________.

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37). On what factor the time interval in the Multivibrator circuit depend?

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38). What happens to the Monostable circuit if it is not triggered externally?

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39). What are the applications of a Monostable circuit?

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40). The cycle to charge a capacitor is __________ than a cycle of discharge in Astable multivibrator.

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41). Which of these multivibrators are preferred for lower clock frequencies?

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42). What kind of Multivibrator have two networks of RC?

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43). Monostable multivibrator consists of _________.

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44). Which multivibrators have only Resistive coupling?

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45). Which multivibrators need external triggering to operate?

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46). What does a Astable multivibrator comprise of?

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47). How many capacitors present in Astable circuit?

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48). What kind of multivibrator preferred in Flash lights?

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49). On what factors the output wave generated is dependent on?

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50). Which is the most commonly preferred circuit of Multivibrators?

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Multivibrator Question & Answers

51). What can improve the switching capability in Bistable multivibrators?

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Read More About Flip-Flops

52).What reduces the time of transition in Bistable multivibrator?

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53). Commutating capacitors are also referred to as ________ capacitors.

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54). What multivibrator is chosen for counting applications?

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55). Which is the costliest multivibrator?

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56). What is the disadvantage of Bistable circuit?

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57). Frequency divider application uses _________.

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58). Which of the multivibrator are known for repairing damaged pulses?

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59). Which of the multivibrator chosen to function as Linear Ramp Generator?

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60). Which state the Bistable circuit will be without trigger?

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61). What happens to the Bistable circuit at High state when the Reset is applied?

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62). What are the multivibrators constructed using 555 Timer?

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63). How many comparators are present in Timer 555?

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64). Which is the most simple circuit constructed using Timer 555?

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65). In which applications 555 timer can be used?

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66). What are the components connected to timer 555 to function it as Astable multivibrator?

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67). How Pulse position modulation is achieved using 555 Timer?

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68). Why 555 Integrated circuit used in the multivibrators?

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69). To achieve PPM the first 555 IC will be operated in __________ mode.

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70). To which pin modulation signal is applied in 555 Timer?

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71). From which of the pins the output of PPM can be collected?

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72). How the time constant of a capacitor to charge and discharge related in Astable 555 circuit?

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73). High output stays __________ in comparison with the Low Output in Astable circuit.

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74). What is the characteristic of the output obtained by Astable circuit?

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75). What do you define as TON / T?

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Multivibrators MCQs with Answers

76). T in the duty cycle stands for _______.

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77). How can you define Duty cycle?

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78). How the charging time TC calculated in 555 Astable circuit?

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79). What is the discharge timing of an Astable circuit of 555?

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80). What is the component connected to 555 circuit to obtain Frequency Modulation?

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81). Which device connected Astable circuit to achieve FM?

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82). Astable circuit to achieve FM’s Modulation signal voltage and time period are ______.

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83). Can an Astable multivibrator able to generate pulse of various widths?

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84). What sets the voltage to high in Monostable circuit?

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85). What are the components necessary to make 555 as Monostable circuit?

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86). In Linear ramp generation circuit what is used as constant source of current?

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87). What circuit is used as a missing pulse detector?

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88). What components can make Monostable circuit as Missing pulse detector?

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89). What type of wave is generated by Free-running Multivibrators?

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90). Which circuit is referred to as Pulse Generator Circuit?

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91). Which multivibrators are used as Memory elements?

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92). Discharge time of a capacitor in a Monostable circuit is termed as _________ time.

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93). Which element in Monostable circuit of CMOS prevent rising of input signal?

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94). The output finite resistance in the Astable circuit of CMOS can be ______.

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95). Which type of Multivibrator generates Clock pulse?

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96). Bistable multivibrator is a _______.

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97). What is the outcome of the Schmitt trigger?

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98). What are the components required in building Op-amp based Astable circuit?

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99). A Monostable circuit with resistance (R) 100 Kilo ohms with a Time delay (T) of 1000 milliseconds. Find the Capacitor value?

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100). A Monostable circuit with resistance (R) as 100 kilo ohms and capacitor (C) as 10 micro farads calculate the Time delay?

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