Order Code: FHM432DV   
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This program shows how electric energy became an essential tool with the advent of electricity storage, allowing the flow of current to do useful work. Using a water flow model to aid understanding, segments address tapping a source, conductors and insulators, direction of flow, potential difference, measuring voltage, measuring current, alternating current, and AC voltage. Explanations develop the difference between electron flow and current flow models, and between direct and alternating current (both one- and two-phase). 26 minutes.

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