by Kimberly Wagner


Voltage is the potential difference in electrical charge between two different areas in a circuit.Voltage is the force that pushes the current along through the circuit.
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An electric current is a flow of electric charge. In electric circuits this charge is often carried by moving electrons in a wire.
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The difficulty an electric current faces to pass through an object.Materials can be classified into one of the three following categories

  • conductors (high)

  • semiconductors (middle)

  • Insulator (low)

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In physics power is how much work is done
the formula for power is p= W/t
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