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EE AND ECE - Transistor Audio Power Amplifiers MCQs
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Avg score: 44% • Most missed: “Power amplifiers handle …………. signals compare to voltage amplifiers”
EE AND ECE - Transistor Audio Power Amplifiers MCQs
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25 Questions

1. In class A operation, the operating point is generally located ………. of the d.c. load line.
2. A class A power amplifier is sometimes called ………….. amplifier
3. For the same a.c. power output as above, what should be the minimum power rating of transistor for class B operation?
4. Class ………….. operation gives the maximum distortion
5. Power amplifiers generally use transformer coupling because transformer permits……..
6. The output stage of a multistage amplifier is also called ……………
7. The maximum efficiency of resistance loaded class A power amplifier is ……..
8. What will be the collector efficiency of a power amplifier having zero signal power dissipation of 5 watts and a.c. power output of 2 watts?
9. If a transistor is operated in such a way that output current flows for 60o of the input signal, then it is …………… operation
10. Transformer coupling can be used in …………… amplifiers
11. When no signal is applied, the approximate collector efficiency of class A power amplifier is …….
12. The most important consideration in power amplifier is ………..
13. The maximum a.c. power output from a class A power amplifier is 10 W. What should be the minimum power rating of the transistor used ?
14. The pulsating d.c. applied to power amplifier causes ……………..
15. If the gain versus frequency curve of a transistor amplifier is not flat, then there is distortion.
16. A transformer coupled class A power amplifier has a load of 100 Ω on the secondary. If the turn ratio is 10:1, what is the value of load appearing on the primary?
17. A power amplifier has comparatively …………….. β
18. The size of a power transistor is made considerably large to …………
19. A class A power amplifier uses …………
20. If the power rating of a transistor is 1W and collector current is 100mA, then maximum allowable collector voltage is ………..
21. The most costly coupling is ……………… coupling
22. Class C amplifiers are used as …………….
23. The driver stage usually employs………….
24. Power amplifiers handle …………. signals compare to voltage amplifiers
25. The output transformer used in a power amplifier is a ……………. transformer

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