07/09/09

Electricity

Is a kind of energy .it has two different kinds of: positive charge and negative charge.

+ And+=repel

-And - =repel

+ And - =attract

Before rubbing, the pen has equal numbers of positive and negative charge. This charges balance each other. The pen is electrically neutral.

When the pen is rubbed with other thing, negative charges travel from the other from the other thing to the pen. The pen now has more negative charges have left the other thing; it now has more positive charges than negative .it has become positively charged.

Atoms contain negatively charged particles =electrons

Positively charged particles=protons

Neutral particles = neutrons