Q.Write any two differences between FET and BJT.

The FET and the BJT differ both in how they are controlled and in the kind of charge carriers that carry their current. …

[!TLDR]

Two key differences: the FET is voltage-controlled and unipolar, while the BJT is current-controlled and bipolar.

In a FET the output (drain) current is controlled by the input voltage applied at the gate, so it is called a voltage-controlled device; in a BJT the output current is controlled by the input base current, so it is a current-controlled device. Secondly, current in a FET is carried by only one type of charge carrier — either electrons (n-channel) or holes (p-channel) — which makes it a unipolar device; in a BJT current is carried by both majority and minority carriers (both electrons and holes), which makes it a bipolar device. Other differences …