Questions
1
In transistor amplifiers, we use ……………. transformer for impedance matching
Answer: Step down
2
RC coupling is not used to amplify extremely low frequencies because ………
Answer: Electrical size of coupling capacitor becomes very large
4
The final stage of a multistage amplifier uses ………………
Answer: Transformer coupling
5
If a three-stage amplifier has individual stage gains of 10 db, 5 db and 12 db, then total gain in db is ……….
Answer: 27 db
6
Transformer coupling is generally employed when load resistance is ………
Answer: Small
7
Transformer coupling provides high efficiency because …………
Answer: c. resistance is low
10
When a multistage amplifier is to amplify d.c. signal, then one must use …….. coupling
Answer: Direct
13
In an RC coupling scheme, the coupling capacitor CC must be large enough ………..
Answer: Not to attenuate the low frequencies
17
In obtaining the frequency response curve of an amplifier, the …………
Answer: Generator output level is held constant
18
In an RC coupled amplifier, the voltage gain over mid-frequency range …………….
Answer: Is constant
