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# What are Diodes?

Extracts from this document...

Introduction

Sam Newman 10E

The Symbol for a basic diode is:

The

Middle

A diode is an electronic device that permits current flow  in only one direction. Most diodes are semiconductors.

A diode has a low resistance to electric current in one direction and a high resistance to it in the reverse direction. This makes a diode useful as a rectifier, which can convert alternating current (AC) into direct current (DC).

A diode using this property is called a Zener diode. It

Conclusion

Also a perfect diode would turn on the instant that any voltage is applied not 0.6v as the diodes we have at the moment turn on.

If they turned on and off as I have said above they would be much more efficient and more useful for the person using them.

I think that that as technology advances in the future diodes will get closer to being a perfect diode.

Diodes - page  of

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