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Evelyn Baker——Studied at Stanford University, Lives in Stanford, CA
An electric charge can have either positive or negative polarity. A voltage or potential difference between two points of an electric circuit has a polarity, describing which of the two points has the higher electric potential. A magnet has a polarity, in that it has two poles described as "north" and "south" pole.read more >>+119962023-05-04 02:43:03
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