For many materials and devices used in electrical circuits, particularly metallic conductors, the difference of potential V applied across the device is related to the circuit I flowing through the device by the equation: V = RI Where: V is the difference of potential or voltage across the device in volts (V), I is the current flowing through the device in amperes (A), R is the resistance of the device in Ohms (Ω). The power delivered by a source of voltage to a device can be expressed as: P…
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