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Questions  

A transistor amplifier with suitable feedback from output side to input side can produce self-sustained oscillations and the circuit becomes an electronic oscillator. The required feedback must be             

a
positive feed back
b
negative feed back
c
either positive feed back or negative feed back
d
positive feed back through a tuned circuit

detailed solution

Correct option is D

transistor act as an oscillator with positive feddback

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Voltage gain of an amplifier without using feedback circuit is 80. What will be the voltage gain of the amplifier using 5% negative feedback ?


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