The positive feedback is required by an amplifier to act an oscillator. The feedback here means___

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Feedback can be achieved by LR network.

External input is necessary to sustain ac signal in output.

The base collector junction must be forward biased.

A portion of the output power is returned back to the input.

answer is B.

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Detailed Solution

When the amplifier connects with positive feedback, it acts as the oscillator. The feedback employed here is positive feedback, this means some amount of the output voltage is given to the input. Hence the circuit continues its process without any input to the oscillator.

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