Intelligence Measurer

The toy is made up of a table with two rows of plates of different metals. The plates of a given rows are linked directly to some wires whose extremity are linked to the voltmeter.

The circuit "metal - body - other metal" is an example of chemical cell, whose working principle is the Volta's electro-chemical serie (Al, Zn, Sn, Cd, Pb, Bi, Hg, Fe, Cu, Ag, Pt, Pd).

The more the metals are distant among each other in the Volta's serie, the more the value of the electro-magnetic strength generated is high.