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In a bi-junction transistor, the base region is,

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In a bi-junction transistor, the base region is, 

(1) Lightly doped so that recombination is more 

(2) Lightly doped so that recombination is less

(3) Heavily doped so that recombination is more 

(4) Heavily doped so that recombination is less

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Correct option: (2) Lightly doped so that recombination is less

Explanation: 

The base region is kept thin and is also lightly doped. This is to ensure that the charge carriers, from the emitter, cross over (without any significant recombination) and get collected in the collector region.

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