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The condider alpha of a transistor is 0.9 .What would be the change in the collector currnt corresponding to a change of 4 mA in the base current in a common emitter arrangement> |
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Answer» Solution :The current gain `alpha` in common base ARRANGEMENT is related to the current gain `BETA` in common emitter arrangement by the relation, `beta=(alpha)/(1-alpha)` Given ,`alpha` =0.9 `therefore beta=(0.9)/(1-0.9)=9` But `beta=((deltaI_(C))/(deltaI_(B)))_(V_(CE))` Hence change in COLLECTOR current `deltaI_(C)=betadeltaI_(B)=9xx4mA=36 mA` |
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