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6. The voltage gain of an amplifier without feedback is 100. If a negative feedback is introduced with the feedback fraction β = 0.1, then the gain of the feedback amplifier is
A. 10.0
B. 111.1
C. 9.09
D. 9.99
Explanation:
7. A good design of amplifier circuit should possess
A. high input impedance
B. high output impedance
C. low power gain
D. low voltage gain
Explanation:
8. In RC coupled amplifier, voltage gain at mid frequency range
A. decreases
B. increases
C. is a constant
D. decreases and then increases
Explanation:
9. Dynamic characteristic of a transistor is used to explain
A. the working of an oscillator
B. circuit configuration
C. the amplifying action
D. the principle of feedback
Explanation:
10. In a two stage RC coupled amplifier, the output of the first stage is fed to the input of the second stage through
A. a resistor
B. an inductor
C. a capacitor
D. a semiconductor diode
Explanation:
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