Q134 / 180 · AIIMS 2009 · Physics

Assertion : Most amplifiers use common emitter circuit configuration. Reason : Its input resistance is comparatively higher.

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

Solution

Most amplifiers use the common emitter circuit configuration because the cricuit offers both current and voltage gains resulting in much higher power gain that can be obtained by a common-base amplifier. The other consideration for the use of the common-emitter amplifier is that its input resistance is higher and of the order of load resistance.

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

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