Electric Charges at Rest Class 7

 Electric Charges at Rest

Introduction 

If we look into the history of the discovery and development of electricity, we find that it was in the sixteenth century that an interesting phenomenon was discovered. It was found that when amber was rubbed against a piece of flannel, it acquired the property of attracting light objects - like dry grass, tiny pieces of paper. This property was not shown by amber when it was not rubbed against the flannel. The rubbed piece of amber was referred to as having 'got electrified' or having acquired an electric charge. (The Greek name for amber is elektron and it was this name that was used for coining the term 'electric'.)