what is the heat dissipated per metre of the wire ?

Posted on 2014-01-06 12:14:00 in Physics by AMELIA

A copper wire of diameter 0.5 mm and length 20 m is connected across a battery of emf 1.5 V and internal resistance 1.25?. Calculate the current density in the wire and the drift velocity v_d, assuming one conduction electron per atom of copper. what is the heat dissipated per metre of the wire ?

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