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

Question

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.

Answer 1

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.