Electric charge (Q) is a measurement of the amount of electrons present in a material. If a material has an excess of electrons,
the material has a negative charge. If the material has a deficiency of electrons, the material has a positive charge.
Static electricity is the presence of charge in a material.
An attracting force is created between charges of different polarity, and a repelling force is created between charges of same
polarity. This force is called an electric field.
The unit of charge is called coulomb, and one coulumb is defined as the charge held by 6.25x1018 electrons.
last edited: 2017.01.13