Oscillator Multiple Choice Questions And Answers


21. .............. oscillator incorporates two interdependent circuits in such a way that the output of each controls the input of the other


   A.Feedback

   B.Sine wave

   C.Relaxation

   D.Low impedance

.


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C.Relaxation

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22. The phase shift oscillator generally contains


   A.Four stages of RC circuit

   B.One stage of LC circuit

   C.Three stages of RC circuit

   D.Two stages of RC circuit


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C.Three stages of RC circuit

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23. The oscillator that is mostly used for generating signals of frequency of few 'MHz' is


   A.Armstrong oscillator

   B.Crystal oscillator

   C.Wein bridge oscillator

   D.Colpitts oscillator


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D.Colpitts oscillator

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24. The fundamental requirement for oscillations in an amplifier is


   A.Positive feedback from output to input

   B.Ample power gain of the amplifier

   C.Negative feedback from output to input

   D.None of the above


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A.Positive feedback from output to input

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25. Which of the following is a stable sine-wave audio-generator?


   A.Wein-bridge oscillator

   B.Hartley oscillator

   C.Armstrong oscillator

   D.None of the above


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A.Wein-bridge oscillator

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