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For a transitor the current ratio `alpha_(DC)` is 69/70 the current gain `beta_(DC)` is

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For a transitor the current ratio `alpha_(DC)` is 69/70 the current gain `beta_(DC)` is
A. 66
B. 67
C. 69
D. 71
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Correct Answer - C
`beta=alpha/(1-alpha)=(69/70)/(1-69/70) = (69/70)/(1/70)`=69
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