Question

Current gain of a transistor in common base mode is $0.95$. Its value in common emitter mode is

• A. 0.95
• B. 1.5
• C. 19
• D. $(19{)}^{-1}$

Answer 1

Answer: (C)

As, $\beta =\frac{\alpha }{1-\alpha }=\frac{0.95}{1-0.95}$
$=\frac{0.95}{0.05}=19$