Question: Which of the following is a key feature of MOSFETs?

Options:

1. They require a continuous current to operate
2. They have a gate that is insulated from the channel
3. They are always in saturation
4. They have low input impedance

Correct Answer: They have a gate that is insulated from the channel

Solution:

MOSFETs have a gate that is insulated from the channel, allowing for very high input impedance and low power consumption.