what is an electric current ? What is responsible for it in solids and in liquids
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An electric current is a stream of charged particles, such as electrons or ions, moving through an electrical conductor or space. It is measured as the net rate of flow of electric charge past a region.
The change from solid to liquid usually does not significantly change the volume of a substance. ... A solid has definite volume and shape, a liquid has a definite volume but no definite shape, and a gas has neither a definite volume nor shape.
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Electric current is the flow of electric charge .
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