____________________________________________________________________________ Amplifiers
CHAPTER 5
CHECK-ON-LEARNING QUESTIONS
When you are satisfied that you have answered every question to the best of your ability,
check your answers using Appendix A. If you missed eight or more questions, you should
review the chapter, paying particular attention to the areas in which your answers were
incorrect.
What is amplification?
1.
What is the definition of an amplifier?
2.
Why do electronic devices use amplifiers?
3.
In what two ways are amplifiers classified?
4.
What type of amplifier would be used to amplify the signal from a radio antenna?
5.
What do you compare to determine if an amplifier is voltage or power?
6.
What is another name given to a video amplifier?
7.
What type of device is a transistor amplifier?
8.
What determines the class of operation of an amplifier?
9.
What are the four classes of operation of a transistor amplifier?
10.
What class of amplifier operates on 50 percent of the input signal?
11.
Why is class C operation more efficient than any other class of operation?
12.
What happens when stages of amplification are added?
13.
What do you call the process of transferring energy between circuits?
14.
What are four of the most common methods of coupling amplifiers?
15.
What is the major problem with direct coupling?
16.
What is the most common form of coupling?
17.
What type coupling would be most useful for an audio amplifier between the first and
18.
second stages?
The most efficient device is one that does the job with the least amount of what?
19.
How do you compute the value of impedance?
20.
What is feedback?
21.
What are two types of feedback?
22.
The amount of the output signal from an amplifier is dependent on what?
23.
What is the most common configuration for transistor amplifiers?
24.
What controls the current through the transistor?
25.
How do you stop negative feedback caused by the emitter resistor?
26.
What type of feedback is used to improve the fidelity of an amplifier by limiting the
27.
input signal?
23 June 2005
TC 9-62
5-35
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