Question: What does the term \'pinch-off\' refer to in a JFET?

Options:

1. The maximum drain current
2. The minimum gate voltage
3. The point where the channel is fully depleted
4. The threshold voltage for conduction

Correct Answer: The point where the channel is fully depleted

Solution:

Pinch-off occurs when the gate voltage is sufficiently negative to deplete the channel of charge carriers, limiting the drain current.