Question

if the current constant for a transistor are
$\alpha \: and \: \beta \: then$

Answer 1

its answer will be option b
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Answer 2

The required "option B)  β > 1 and α < 1" is correct.

Explanation:

Alpha(α): It is the ratio of collector current($I_C$) to the emitter current($I_E$).

∴ α = $\dfrac{I_C}{I_E}$

Its value is always less than 1.

Beta(β):It is the ratio of collector current($I_C$) to the base current$(I_b)$.

∴  β $=\dfrac{I_c}{I_b}$

Its value is greater than 100.

The relation between  α and β,

$\beta=\dfrac{\alpha}{1-\alpha}$

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

Conclusion:α < 1 and β > 1

Hence, the required "option B)  β > 1 and α < 1" is correct.