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NEET2009PhysicsSemiconductorsActual

Assertion : In a common-emitter amplfier, the load resistance of the output circuit is 1000 times the load resistance of the input circuit. If =0.98 , then voltage gain is 49 10^3 . Reason : = 1- (symbols have their usual meaning).

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion
  3. CIf assertion is true but reason is false
  4. DIf both assertion and reason are false.

Correct answer

C. If assertion is true but reason is false

Step-by-step solution

We know that = i_C i_E and = i_C i_B Also = 1- = 0.98 1-0.98 =49 Voltage gain = = R₂ R₁ =49 1000=49 10^3

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