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Multistage Transistor Amplifiers MCQs
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Multistage Transistor Amplifiers MCQs
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25 Questions

1. Transformer coupling provides high efficiency because ............
2. In the initial stages of a multistage amplifier, we use ...........
3. The ear is not sensitive to .............
4. The value of emitter capacitor CE in a multistage amplifier is about ........
5. In obtaining the frequency response curve of an amplifier, the ............
6. Transformer coupling is used for .............. amplification
7. If a three-stage amplifier has individual stage gains of 10 db, 5 db and 12 db, then total gain in db is ..........
8. An advantage of RC coupling scheme is the .............
9. The power output of an audio system is 18 W. For a person to notice an increase in the output (loudness or sound intensity) of the system, what must the output power be increased to ?
10. 1 db corresponds to ............. change in voltage or current level
11. In transistor amplifiers, we use ................ transformer for impedance matching
12. The frequency response of transformer coupling is .............
13. The lower and upper cut off frequencies are also called ..................... frequencies
14. If the power level of an amplifier reduces to half, the db gain will fall by .......
15. In an RC coupled amplifier, the voltage gain over mid-frequency range ................
16. In an RC coupling scheme, the coupling capacitor CC must be large enough ...........
17. RC coupling is not used to amplify extremely low frequencies because .........
18. A gain of 1,000,000 times in power is expressed by ................
19. The final stage of a multistage amplifier uses ..................
20. RC coupling is used for ................... amplification
21. When a multistage amplifier is to amplify d.c. signal, then one must use ........ coupling
22. The noise factor of an ideal amplifier expressed in db is ..............
23. A current amplification of 2000 is a gain of ................
24. The gain of an amplifier is expressed in db because ...........
25. The output of a microphone is rated at -52 db. The reference level is 1V under specified conditions. What is the output voltage of this microphone under the same sound conditions?

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