Thursday, August 8, 2013

Electrodes


Remember that an electrical conductor is something that electricity goes through very well.

And a semiconductor is something that electricity goes through, but not very well.

Sometimes you want to connect a power source like a machine at a doctor's office,
to a semiconductor (like a person!) for some medical tests.

When you hook a good conducting wire up from a power source to a semiconductor,
that wire is called an electrode.

We use electrodes in all types of places from doctor's offices, to car batteries, to science labs.

eeg cap
(from: wikipedia - electroencephalography)