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Assertion (A): Assertion: Fixed bias is unsuitable for a linear amplifier.

Reason (R): Reason: Its stability factor is one plus beta, the worst possible value.

Select the correct answer from the options below.

  • A.Both A and R are true, and R is the correct explanation of A
  • B.Both A and R are true, but R is not the correct explanation of A
  • C.A is true but R is false
  • D.A is false but R is true

Answer: A

Both hold and the second is the reason: with nothing in the circuit responding to a change in collector current, every drift in leakage or beta appears at the output multiplied rather than opposed. It remains perfectly usable in switching circuits, where the operating point is either extreme and its exact value does not matter. A specification's importance always depends on what the circuit is for. The shared properties explain why these schemes form a family, and the differences explain why more than one exists.

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