BasicB-004-004-003
In a field-effect transistor, which electrode controls the resistance of the device's channel?
A
Answer
Components and circuits
Type
A
Gate
B
Drain
C
Source
D
Collector
Answer Notes
In a Field-Effect Transistor (FET), the gate serves as the control terminal. By applying a voltage to the gate, an electric field is created which alters the width of the conductive channel between the source and the drain, effectively controlling the channel's electrical resistance.
The drain and source are simply the entry and exit points for the charge carriers, not the control elements. The collector is a terminal found on bipolar transistors, not FETs, making it an incorrect choice for this device.
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In a field-effect transistor, from which electrode do charge carriers enter the channel?