A potential difference is applied across a copper wire of radius 0.5 mm. It results in a…

A potential difference is applied across a copper wire of radius 0.5 mm. It results in a uniform electric field of 1.5 V/m along the length of the wire. Consequently there is a current in the wire. Temperature of the wire is 60^oC.Assuming each copper atom contributes one free electron .Given that density of copper is 8.9 gm/cm³ and resistivity of copper at 20^oC is 1.7×10^–8 ohm.m and its temperature coefficient of resistivity at 20^oC is 3.9×10^–3/^OC . Atomic mass of copper is 63.5 . Answer the following questions.
 
Potential difference that need to be applied between the ends of a 4 m long wire to produce the given field is