JFET (Junction Gate Field-Effect Transistor):
JFET is a field-effect transistor and it is the three terminal devices. There are number of application of that, it can be used as switch, amplifier, etc. It is classified into two categories: N-Channel JFET and P-Channel JFET.
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MOSFET (Metal–Oxide–Semiconductor Field-Effect Transistor):
The MOSFET is a field-effect transistor and it is a four terminal device with source(S), gate (G), drain (D) and body (B) terminals. It’s generally classified into two basic configurations: Depletion Mode MOSFET and Enhancement Mode MOSFET.
Let's see the difference between Primary Key and Foreign Key: