Assertion :A transistor amplifier in common emitter configuration has a low input impedance. Reason: The base to emitter region is forward biased.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The input impedance of common emitter configuration $= \frac{Δ V_{B E}}{Δ i_{B}}$ for a constant $V_{C E}$
where $V_{B E}$ is voltage across base and emitter(base emitter region is forward biased)
$Δ i_{B}$ is base current which is of order of few microamperes. Thus input impedance is low.
Hence correct answer is option A.

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