In a transistor,the value of alpha varies bet | vedclass

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(C) In a transistor,the common base current gain $\alpha$ is related to the common emitter current gain $\beta$ by the formula: $\beta = \frac{\alpha}

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$20$ and $100$

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(C) In a transistor,the common base current gain $\alpha$ is related to the common emitter current gain $\beta$ by the formula: $\beta = \frac{\alpha}{1 - \alpha}$.Case $I$: When $\alpha = \frac{20}{21}$,$\beta = \frac{20/21}{1 - 20/21} = \frac{20/21}{1/21} = 20$.Case $II$: When $\alpha = \frac{100}{101}$,$\beta = \frac{100/101}{1 - 100/101} = \frac{100/101}{1/101} = 100$.Therefore,the value of $\beta$ varies between $20$ and $100$.

In a transistor,the value of $\alpha$ varies between $\frac{20}{21}$ and $\frac{100}{101}$. Then the value of $\beta$ varies between

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