[محمد ابوزيد]

1.2 Properties of electrostatic
2.1 Electric charge


If a rod of ebonite is rubbed with fur, or a fountain pen with a coat-sleeve, it gains the power to attract light bodies, such as pieces of paper or tin foil. The discovery that a body could be made attractive by rubbing is attributed to Thales (640-548 B.C). He seems to have been led to it through the Greeks’ practice of spinning silk with an amber spindle; the rubbing of the spindle cause the silk to be attracted to it. The Greek world of amber is electron, and a body made attractive by rubbing is said to be electrified or charged. The branch of electricity is called Electrostatics.