A potential difference of 1.30 V will be applied to a 25.0 m length of 18-gauge

Question

A potential difference of 1.30 V will be applied to a 25.0 m length of 18-gauge copper wire (diameter = 0.0400 in.). Calculate the following values.

(a) the current
                               

(b) the magnitude of the current density
     A/m2

(c) the electric field
     V/m

(d) the rate at which thermal energy will appear in the wire

A potential difference of 1.30 V will be applied to a 25.0 m length of 18-gauge copper wire (diameter = 0.0400 in.). Calculate the following values. the current the magnitude of the current density the electric field the rate at which thermal energy will appear in the wire

Explanation / Answer

Resistance of a wire in ?
R = ?L/A
? is resistivity of the material in ?-m
L is length in meters
A is cross-sectional area in m

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