MOSFET terminals Identify the terminal name that does <em>not</em> belong to a MOSFET device.

Introduction / Context:
MOSFETs are three-terminal field-effect devices used extensively in digital and analog circuits. Knowing their terminal names is fundamental to reading schematics, data sheets, and analyzing circuits correctly.

Given Data / Assumptions:

• MOSFET standard terminals: Gate (control), Drain, Source.
• “Base” is a terminal name associated with bipolar junction transistors (BJTs).

Concept / Approach:

The MOSFET uses an insulated gate to modulate channel conductivity between source and drain. There is no “base” terminal in MOSFET terminology; that belongs to BJTs (emitter, base, collector). Therefore, among the listed options, “Base” does not belong to a MOSFET.

Step-by-Step Solution:

Verification / Alternative check:

Any MOSFET datasheet (discrete or IC) labels pins as G, D, S (and sometimes body/bulk). BJTs use E, B, C; hence “Base” clearly identifies a BJT, not a MOSFET.

Why Other Options Are Wrong:

• Gate, Drain, Source are the canonical MOSFET terminals.

Common Pitfalls:

• Confusing body/bulk connection (often tied to source in many technologies) with the named three external terminals.

Final Answer:

Base