Correct Answer - Option 3 : 49
CONCEPT:
Alpha gain (α): In the common-base configuration, the current gain that is defined as the ratio of change in collector current to change in emitter current is known as alpha gain.
Beta gain (β): It is the current gain in the common Emitter configuration. the current gain that is defined as the change in collector current to base current is known as beta gain.
The relation between alpha gain and beta gain is given by:
\(α = \frac{β}{1+β}\)
where α is the alpha gain and β is the beta gain.
Calculation:
given that α = 0.98; β = ?
\(α = \frac{β}{1+β}\)
\(\beta = \frac{\alpha}{1- \alpha}\)
\(\beta = \frac{0.98}{1-0.98}\) = 0.98/0.02 = 49
So the correct answer is option 3.
