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.Management Sciences
Category: Multi-Stage Transistor Amplifiers
In practice, voltage gain is expressed______________?
A. In db
B. In volts
C. As a number
D. None of the above
In RC coupling, the value of coupling capacitor is about_______________?
A. 100 pF
B. 0.1 µF
C. 0.01 µF
D. 10 µF
An amplifier receives 0.1 W of input signal and delivers 15 W of signal power. What is the power gain in db?
A. 8 db
B. 6 db
C. 5 db
D. 4 db
Transformer coupling is generally employed when load resistance is______________?
A. Large
B. Very large
C. Small
D. None of the above
The gain of an amplifier is expressed in db because_____________?
A. It is a simple unit
B. Calculations become easy
C. Human ear response is logarithmic
D. None of the above
If a three-stage amplifier has individual stage gains of 10 db, 5 db and 12 db, then total gain in db is____________?
A. 600 db
B. 24 db
C. 14 db
D. 27 db
The purpose of RC or transformer coupling is to_____________?
A. Block a.c.
B. Separate bias of one stage from another
C. Increase thermal stability
None of the above
The lower and upper cut off frequencies are also called_____________frequencies?
A. Sideband
B. Resonant
C. Half-resonant
D. Half-power
In transistor amplifiers, we use_____________transformer for impedance matching?
A. Step up
B. Step down
C. Same turn ratio
None of the above
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