In a Field-Effect Transistor (FET), the drain current (I_D) is controlled by the gate-source voltage (V_GS) and the drain-source voltage (V_DS). The FET operates in three regions:

• Cutoff Region: The FET is off, and no current flows.

• Linear/Ohmic Region: The current increases linearly with V_DS.

• Saturation Region: The current becomes constant, and the FET is fully on.

Significance
The experiment helps understand FET behavior for amplification, switching, and voltage control in circuits. Key parameters like threshold voltage and transconductance are essential for designing FET-based applications in amplifiers and digital circuits.