Question

The DC current gain (\( \beta \)) of a BJT is 50. Assuming that the emitter injection efficiency is 0.995, the base transport factor is

• A. 0.985
• B. 0.990
• C. 0.980
• D. 0.995

Hint:

For calculating the base transport factor, remember that it is related to current gain and emitter injection efficiency through the equation \( \beta = \gamma \times \beta_T \).

Answer 1

The Correct Option is A

The DC current gain \( \beta \) of a BJT is related to the emitter injection efficiency \( \gamma \) and the base transport factor \( \beta_T \) by the equation: \[ \beta = \gamma \times \beta_T \] Given \( \beta = 50 \) and \( \gamma = 0.995 \), solving for \( \beta_T \): \[ \beta_T = \frac{\beta}{\gamma} = \frac{50}{0.995} = 0.985 \] Thus, the base transport factor is 0.985. Therefore, the correct answer is option (1).