# Homework Help: Voltage/current problem

1. Apr 6, 2005

### uk9999

what sort of voltage would i need to get a measurable current through a standard non uniform clay brick - where the current is in mA???

thanks

2. Apr 6, 2005

### dextercioby

In the simplest terms,it would depend on the range in which the resistence of the clay brick is.If it's $M\Omega$ (it's not a metal),then u figure out the voltage...

Daniel.

EDIT:DO NOT DOUBLE POST!!

3. Apr 6, 2005

### uk9999

well i am supposed to be working out the resistance by putting a voltage through two oppisite faces of a brick i just need a measurable current so needed an appriopiate electro-motive force (voltage)
does anyone know any where i can find this information or the resistance of a certain type brick?

4. Apr 6, 2005

### dextercioby

You can google for key words.The name of the substance (whatever that clay is about) and "electrical resistance"...

There have to be some tables out there...

Daniel.

5. Apr 6, 2005

### uk9999

well i tryed google before hand with every variation i could think and have just tryed once again with no success