Chapter 7 OSCILLATORS MCQs

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1. . In oscillators ________ feedback is used.





2. . The Wien bridge oscillator is used at ________ frequencies.





3. . In Wien bridge oscillator, bridge network has ________ circuit.





4. . A lead circuit has a phase angle that is ________?





5. . A lag circuit has a phase angle that is ________?





6. . A Wien bridge oscillator uses ________ feedback.





7. . Initially, the loop gain of a Wien bridge oscillator is ________?





8. . A Wien bridge oscillator is sometimes called ________.





9. . RC phase shift oscillator has ________ lead-lag circuits?





10. . For oscillations to set up in a circuit, the closed loop gain must be greater than unity and phase shift around the loop must be ________?





11. . The most widely used LC oscillator is ________?





12. . Link coupling refers to ________ coupling.





13. . The Hartley oscillator uses two ________ in LC network.





14. . The Colpits oscillator uses two ________ in LC network.





15. . The material with piezoelectric effect is ________.





16. . Crystals have a ________.





17. . Hartley and Colpits oscillators are types of ________.





18. . Pulse tone oscillator uses ________ multivibrators.





19. . RC phase shift oscillator produces ________ wave.





20. . The main property of crystal oscillator is its ________.





21. . The pulse width out of a one-shot multivibrator increases when ________.





22. . The output waveform of 555 timer is ________.





23. . The quantity that remains constant in a pulse width modulator is ________.





24. . The kind of oscillator found in an electric wristwatch is the ________.





25. . An astable 555 timer has ________ stable states.





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