how to flow current in a wire
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When a wire is connected to battery terminals, electrons flow from negative to positive. Unlike (opposite) charges attract, like (same) charges repel. Electrons have a negative charge—they are repelled from the negative and attracted to the positive.
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Electric current in a wire, where the charge carriers are electrons, is a measure of the quantity of charge passing any point of thewire per unit of time. ... Current is usually denoted by the symbol I. Ohm's law relates thecurrent flowing through a conductor to the voltage V and resistance R; that is, V = IR.
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