Question

The current gain in common base amplifier is

• A. high
• B. very low
• C. about $1$
• D. very high

Answer 1

The correct option is C about $1$

$Answer:-$ C

With common-emitter and common-collector amplifier configurations, the transistor parameter most closely associated with gain was $\beta$. In the common-base circuit, we follow another basic transistor parameter: the ratio between collector current and emitter current, which is a fraction always less than $1$. This fractional value for any transistor is called the alpha ratio, or $\alpha$ ratio.