Question

for a transistor in common base configuration the ratio of collector current to emitter current is beta and ratio of collector to base current is alpha which of following is true :
(a) B = alpha/alpha +1
(b) B= alpha +1/alpha
(c) B = alpha -1/alpha
(d) B = alpha/alpha-1
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Answer 1

Answer:

sorry

Explanation:

sorry I don't know this question because I am studying 7th

Answer 2

Transistor:

Explanation:

Let $\displaysyle I_c$ be the collector current & $\displaysyle I_e$ be the emitter current.

For a transistor in a common base configuration, the ratio of collector current to emitter current is beta.

i.e.    $\displaystyle \beta = \frac{I_c}{I_e}$

For a transistor in a common base configuration, the ratio of collector to base current is alpha.

i.e   $\displaystyle \alpha = \frac{I_c}{I_b}$

Therefore the relation between α & β is given by

$\displaystyle \mathbf{\beta = \frac{\alpha }{1 -\alpha }}$

∴ The correct option is d.