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Component 1: Applications of diodes

2 dot points across 2 inquiry questions. Click any dot point for a focused answer with worked past exam questions where available.

How does a diode conduct one way only, and how is it used to protect a circuit and to rectify AC?

The silicon diode and its one-way (rectifying) behaviour: using a diode to protect a circuit against reverse polarity and against inductive spikes, and half-wave rectification to convert AC into DC.
A focused answer to WJEC Eduqas GCSE Electronics on diodes and rectification, covering the silicon diode's one-way behaviour, using a diode to protect against reverse polarity and inductive spikes, and half-wave rectification of AC to DC.
9 min answer →

How does a Zener diode hold a steady voltage, and how is it used to regulate a supply?

The Zener diode and its reverse breakdown behaviour, and its use with a series resistor to provide a stable regulated output voltage.
A focused answer to WJEC Eduqas GCSE Electronics on the Zener diode, covering its reverse breakdown behaviour and its use with a series resistor to provide a stable regulated output voltage.
9 min answer →