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If the emitter and base of a transistor ...

If the emitter and base of a transistor have same doping concentration, how wiII the base current and the coIIector current be affected?

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The base current will increase and collector current will decrease. Most of the majority carriers coming from the emitter will be neutralised in the base by electron-hole recombination. This results a large base current. Only few majority carrers will reach the collector resulting in a small collector current.
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