Give the sign convention for charge as given by Benjamin Franklin.

Benjamin Franklin, a prominent figure in the study of electricity, established a sign convention for electric charge. He arbitrarily assigned the term 'positive' (+) to the type of charge that was present in glass after being rubbed with silk, and 'negative' (-) to the type of charge present in resin after being rubbed with fur. This is known as Franklin's sign convention.

It's important to note that Franklin's choice was arbitrary and, as it turned out, the 'positive' charge he identified is actually the absence of electrons, while the 'negative' charge is due to an excess of electrons. However, his convention is still widely used today.