Q136 / 180 · AIIMS 2006 · Physics

Assertion : In common base configuration, the current gain of the transistor is less than unity. Reason : The collector terminal is reverse biased for amplification.

  • A
    If both assertion and reason are true and reason is the correct explanation of the assertion
  • B
    If both assertion and reason are true but reason is not the correct explanation of the assertion
  • Correct answer
    C
    If assertion is true, but reason is false
  • D
    Both assertion and reason are false statements.

Solution

The common base configuration of $n-p-n$ transistor is used for voltage amplification. The current amplification is very small. Assertion is true. The collector is reverse biased for voltage amplification. The Reason given has not mentioned that it is voltage amplification. The Reason is therefore incomplete by itself. It is wrong.

Hence, the correct answer is option: 'C'.

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