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A transistor is a miniature electronic component that can do two different jobs. It can work either as an amplifier or a switch: 1  When it works as an amplifier, it takes in a tiny electric current at one end (an input current) and produces a much bigger electric current (an output current) at the other.2  Transistors can also work as switches.ormally, the holes in the base act like a barrier, preventing any significant current flow from the emitter to the collector while the transistor is in its off state. A transistor works when the electrons and the holes start moving across the two junctions between the n-type and p-type silicon.
Rating Newest Oldest. Best Answer: There are at least two types, FET (Field Effect) and BJT (Bi Junction). I'll kind of mash up the two in the explanation. A transistor has three connections. There is one connection that is a current source, one that acts as a gate, and another where the current leaves.As a small signal is provided at the gate, a larger current passes through the transistor.This allows it to provide amplification.ating Newest Oldest. Best Answer: There are at least two types, FET (Field Effect) and BJT (Bi Junction). I'll kind of mash up the two in the explanation. A transistor has three connections. There is one connection that is a current source, one that acts as a gate, and another where the current leaves.