Determine the potential difference among the ends of wire


i) The electric field within a 30 cm long copper wire is around 0.010 V/m. Determine the potential difference among the ends of the wire? Determine the current in the wire? The diameter of the wire is around 0.5 mm.

ii) A long gold wire of 50 cm is joined across the terminal of a battery of 12V. When the current in the wire is 2.0 A, determine the diameter of the wire?

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Physics: Determine the potential difference among the ends of wire
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