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Can the electric field strength of a wire simply be calculated using the voltage / length formula:

Electric Field Strength = Voltage Across Wire/ Length of Wire

I am asking about a wire with current running through it and not a charged wire.

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  • $\begingroup$ To clarify, you're asking about a wire with current running through it, and not a charged wire (electrostatics)? $\endgroup$ – BMS Sep 26 '14 at 18:28
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    $\begingroup$ @BMS Yes, I am asking about a wire with current running through i and not a charged wire. $\endgroup$ – dj1 Sep 26 '14 at 18:45
  • $\begingroup$ Got it. Please add that to your question text, as some won't read these comments prior to answering. $\endgroup$ – BMS Sep 26 '14 at 18:48
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Your method for evaluating the electric field assumes it is appropriate to model it as spatially constant within the wire since you're basically taking a spatial average. You'll have to decide wether or not this is accurate.

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