michael faraday came up with positive and negative charges.
michael faraday came up with positive and negative charges.
who came up with positive and negative charges?
michael faraday
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conductive metal objects contain mobile electric charges (electrons) that can move about freely in the metal. in an uncharged state, each part of the metal contains equal quantities of positive and negative charges, intimately mixed, so no part of it has a net charge. if an external charged object is brought near a piece of metal, the force of the charge causes these internal charges to separate. the charges of opposite polarity to the external charge are attracted to it, and move to the surface of the object facing the charge. the charges of the same polarity are repelled and move to the surface of the metal away from the charge. this is called electrostatic induction. in procedure 2 above, as the charge "c" is lowered into the container, the charges in the metal of the container separate. if "c" has a positive charge, the negative charges in the metal are attracted to it and move to the inner surface of the container, while the positive charges are repelled and move to the outside surface. if "c" has a negative charge, the charges have opposite polarity. since the container was originally uncharged, the two regions have equal and opposite charges. the induction process is reversible: in procedure 4, when "c" is removed, the attraction of the opposite charges cause them to intermingle again, and the charge on the surfaces reduces to zero.
faraday's ice pail experiment