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What is the left hand section of a junction transistor called?

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What is the left hand section of a junction transistor called?

(a) base

(b) collector

(c) emitter

(d) depletion region

I have been asked this question in an interview for job.

This interesting question is from The Junction Transistor topic in section Transistor Characteristics of Electronic Devices & Circuits

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Correct choice is (c) emitter

To elaborate: The main function of this section is to supply majority charge carriers to the base. Hence it is more heavily doped in comparison to other regions. This forms the left hand section of the transistor.

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