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

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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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
For common base, Input is $I_{c}$ and output is $I_{e}$
Current gain $= \frac{I_{c}}{I_{e}} = \frac{I_{c}}{I_{c} + I_{b}}$ which is less unity.
Collector terminal is reversed biased to increase the collector current. Both $A$ and $R$ are correct but they are uncorrelated statements.

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