Context: FETs are further divided into depletion-mode and enhancement-mode types, depending on whether the channel is turned on or off with zero gate-to-source voltage. For enhancement mode, the channel is off at zero bias, and a gate potential can "enhance" the conduction. For the depletion mode, the channel is on at zero bias, and a gate potential (of the opposite polarity) can "deplete" the channel, reducing conduction. For either mode, a more positive gate voltage corresponds to a higher current for n-channel devices and a lower current for p-channel devices. Nearly all JFETs are depletion-mode because the diode junctions would forward bias and conduct if they were enhancement-mode devices; most IGFETs are enhancement-mode types.

Question: How are FET's separated?
Answer: depletion-mode and enhancement-mode types

Question: At what point is a channel off in enhancement-mode?
Answer: at zero bias

Question: At what point is a channel on in depletion-mode?
Answer: at zero bias

Question: What channel corresponds with high current?
Answer: n-channel devices

Question: What channel corresponds with low current?
Answer: p-channel devices

Question: What type of FET is more common?
Answer: Unanswerable

Question: What controls how positive the gate voltage is?
Answer: Unanswerable

Question: What controls the gate potential of a FET?
Answer: Unanswerable

Question: What type of FET usually has a higher voltage?
Answer: Unanswerable