Advanced Qualification · A-002 Advanced components and circuits · A-002-004-002
What is a depletion-mode FET?
- A An FET without a channel to hinder current through the gate
- B An FET that has a channel that blocks current when the gate voltage is zero
- C An FET that has a channel with no gate voltage applied; a current flows with zero gate voltage
- D An FET without a channel; no current flows with zero gate voltage
Correct answer: C — An FET that has a channel with no gate voltage applied; a current flows with zero gate voltage. From the official ISED question bank, verified word for word.
Why
A depletion-mode field-effect transistor, or FET, is built with a physical channel that already exists between its terminals, so electricity flows freely even when no voltage is applied to the gate. The full explanation — and one for every question — is in Pro.
Practise this section
Advanced components and circuits: semiconductors, amplifier classes, oscillators, mixers, filters and digital logic.