In a junction transistor, the doping level of collector region is:

In a junction transistor, the doping level of collector region is: 

(1) Higher than emitter region (2) Lower than base region (3) Is higher than base region but lower than emitter region  (4) Independent of the doping of base and emitter regions.
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In a junction transistor, the doping level of collector region is: Is higher than base region but lower than emitter region.

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