Electro-neutral system requires->

1. Dec 23, 2003

deda

An system is usually considered as electro neutral if it has equal amount of positive and negative charge. But it doesn't have to be so considering the Archimed's equation for lever:
$$F_1D_1=F_2D_2$$
F=force; D=distance
And since $$\frac{F_1}{F_2}=-\frac{Q_1}{Q_2}$$ => $$Q_1D_1=-Q_2D_2$$
Q=charge
It reads the larger charge by absolute value should be closer to the equilibrium point and the smaller charge by absolute value should be more distant from the equilibrium point. And if we put what ever charge in the equilibrium point then the influences from the initial two neutralize, thus the system behaves as electro-neutral although it has different charges by absolute value.