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The value of current gain `alpha` of trasistor is `0.98`. The value of `beta` will beA. 490B. 4.9C. 59D. 49 |
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Answer» Correct Answer - D (d) Current gain `alpha` is the ratio of change in collector current to the change in emitter current, while current gain `beta` is the ratio of change in collector current ot change in base current. Current gains are given by `alpha = (Delta i_(C))/(Delta i_(E))` and `beta = (Delta i_(C))/(Delta i_(B))` where `Delta i_(C ), Delta i_(E), Delta i_(B)`a re change in collector current, emitter current and base current respectively. The relation between `alpha` and `beta` is `beta = (alpha)/(1 - alpha)` Given, `alpha = 0.98`, hence we have `beta = (0.98)/(1 - 0.98) = 49` |
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