Question

If for a transistor ,beta =49 then find the value of alpha.

Answer 1

o. 98 is the value of alfa

Answer 2

Given: For a transistor, beta =49.

To find: The value of alpha.

Solution: The value of alpha is 49/50.

The formula of alpha and beta can be written as shown below.

$\alpha = \frac{I_{C}}{I_{E}}$

$\beta = \frac{I_{C}}{I_{B}}$

Here, $I_{C}$ is the current in the collector, $I_{E}$ is the current in the emitter and $I_{B}$ is the current in the base of the transistor. Now, in a transistor, the following equation is true.

$I_{E} = I_{C} + I_{B}$

Dividing both sides with $I_{C}$.

$\frac{I_{E}}{I_{C}} = \frac{I_{C} }{I_{C}} + \frac{ I_{B}}{I_{C}}$

$\frac{1}{\alpha } = 1 + \frac{1}{\beta }$

Thus, the value of beta can be substituted and the value of alpha can be found.

$\frac{1}{\alpha } = 1 + \frac{1}{49 }$

$\alpha = \frac{49}{50}$

Therefore, the value of alpha is 49/50.