Why the base current in a transistor is very small
Answers
hey mate!
Few electrons injected by the emitter into the base of an NPN transistor fall into holes. ... Most of the emitter current of electrons diffuses through the thin base into the collector. Moreover, modulating the small base current produces a larger change in collector current.
Answer:
The base current is very small in transistor as this region is lightly doped.
Explanation:
Transistor is semiconductor device. It is used to amplify power and electrical signals.
The structure of transistor is such that the base region is very thin and is very lightly doped. Emitter is heavily doped. Because of this, among the large number of electrons in heavily doped emitter, only few electrons are emitted. They combine with holes present in base region.
Hence, the base current is very low.
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