Question

in a bjt circuit, if \\( \beta = 125 \\), what is \\( \alpha \\)?
select one:
\\( \bigcirc \\) a. \\( 0.998 \\)
\\( \bigcirc \\) b. \\( 0.992 \\)
\\( \bigcirc \\) c. not enough information.
\\( \bigcirc \\) d. \\( 1.05 \\)

Explanation:

Step1: Recall the relationship between α and β in BJT

The formula relating the current gain \( \alpha \) and \( \beta \) in a BJT (Bipolar Junction Transistor) is \( \alpha=\frac{\beta}{1 + \beta} \).

Step2: Substitute the given value of β

We are given that \( \beta = 125 \). Substitute this value into the formula:
\( \alpha=\frac{125}{1 + 125}=\frac{125}{126}\approx0.99206 \approx 0.992\)

Answer:

b. 0.992