GCSE Physics

Voltage & Current Graph: diodes

One special thing about diodes is that if you connect them the "wrong way around" in a circuit, they have a very high resistance, so virtually no current flows (less than a microamp).

This means a better graph of their behaviour includes a large zero section:

full current-voltage graph for a diode

Of course, if you put too high a voltage across them, even the "wrong way", they will blow up as too much current flows!

GCSE Physics Go back a page GCSE PhysicsElectricity Menu GCSE PhysicsGo to next page