Questions
1
Low efficiency of a power amplifier results in ……………….
Answer: More battery consumption
2
The size of a power transistor is made considerably large to …………
Answer: Dissipate heat
3
The output stage of a multistage amplifier usually employs ………..
Answer: Push-pull amplifier
5
A class A power amplifier is sometimes called ………….. amplifier
Answer: Single-ended
6
When a transistor is cut off……………..
Answer: Maximum voltage appears across transistor
7
If the zero signal dissipation of a transistor is 1W, then power rating of the transistor should be at least ……………….
Answer: 1 W
8
If a transistor is operated in such a way that output current flows for 60o of the input signal, then it is …………… operation
Answer: Class C
9
A 2-transistor class B power amplifier is commonly called ……….. amplifier
Answer: Push-pull
13
In class A operation, the operating point is generally located ………. of the d.c. load line.
Answer: At the middle
14
Power amplifiers handle …………. signals compare to voltage amplifiers
Answer: Large
16
The maximum efficiency of transformer coupled class A power amplifier is ………………
Answer: 50%
17
The maximum efficiency of resistance loaded class A power amplifier is ……..
Answer: 25%
19
………………. coupling is generally employed in power amplifiers
Answer: Transformer
20
The output stage of a multistage amplifier is also called ……………
Answer: Power stage
