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A copper wire with diameter of 1,5 mm and length of 4m carries constant current of...

A copper wire with diameter of 1,5 mm and length of 4m carries constant current of 1.75 A. The free electron density in the wire is 8,5x1028 m-3. The resistivity of copper is 1,72x10-8 .m. Calculate

  a) current density,

b)drift velocity,

c) magnitude of electric field,

d) potential between the terminals of wire,

e)power dissipated as heat

f) mean free time. (mass of electron: 9,1x10-31kg, magnitude of charge of electron: 1,6x10-19 C)

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