MadSci Network: Physics

Re: How can I increase the voltage in a potato battery?

Date: Tue Feb 25 21:13:20 2003
Posted By: Nauzad Tantra, Undergraduate, Production/ Industrial engg., D J Sanghvi college of engg.
Area of science: Physics
ID: 1046098104.Ph

Possible causes for this may include:
1. Check the connections. A loose connection creates a lot of resistance
between the two conductors. Preferably, solder the joints.

2. Check for dirt, dust, grease on the connections, also see if the
connector ends are tarnished (blackened). If so clean the connections with
a sand paper (emery cloth).

3. I wonder how accurate your measuring instruments are. For instance the
voltage from 1 potato may be 0.4V or 0.35V, in which case, 6 potatoes would
produce about 2V.

4. Id also like to point out, that the voltage generated by one potato may
be different to that generated by another one. The size, moisture etc. of
the vegetable may influence the voltage. So try to add up the individual
voltages rather than multiply one reading by the number of potatoes.

I hope this helps. Keep us informed of the results

Nauzad Tantra

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