Chapter 1 Introduction to Amplifiers MCQs

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1. . The three terminals of a bipolar junction transistor are called





2. . In a PNP transistor, the p-regions are





3. . For operation as an amplifier, the base of a NPN transistor must be





4. . The emitter current is always





5. . The βDC of a transistor is its





6. . If IC is 50 times larger than IB, then βDC is





7. . The approximate voltage across the forward-biased base-emitter junction of a silicon BJT is





8. . The bias condition for a transistor to be used as linear amplifier is called





9. . If the output of a transistor amplifier is 5 V rms and the input is 100 mV rms, the voltage gain is





10. . When operated in cutoff and saturation, the transistor acts like





11. . In cutoff, VCE is





12. . In saturation, VCE is





13. . Once in saturation, a further increase in base current will





14. . If the base-emitter junction is open, the collector voltage is





15. . The maximum value of collector current in a biased transistor is





16. . Ideally, a DC load line is a straight line drawn on the collector characteristics curves between





17. . The input resistance at the base of a biased transistor depends mainly on





18. . In voltage divider biased transistor circuit, Rin(base) can generally be neglected in calculation when





19. . In a certain voltage divider biased NPN transistor, VB is 2.95 V. The DC emitter voltage is approximately





20. . Voltage divider bias





21. . The disadvantage of fixed/base bias is that





22. . Emitter bias is





23. . In an emitter bias circuit, RE = 2.7 kΩ and VEE = 15 V. The emitter current is





24. . Collector feedback bias is based on the principle of





25. . The parameter hfe corresponds to





26. . A certain common emitter amplifier has a voltage gain of 100. If the emitter bypass capacitor is removed





27. . In a certain emitter follower circuit, the current gain is 50. The power gain is approximately





28. . The input resistance of a common base amplifier is





29. . A certain common source amplifier has a voltage gain of 10. If the source bypass capacitor is removed





30. . The common gate amplifier differs from both the CS and CD configuration in that it has a





31. . If you are looking for both good voltage gain and high input resistance, you must use a





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