A copper wire joins an aluminum wire whose diameter is twice that of the copper. The same
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A copper wire joins an aluminum wire whose diameter is twice that of the copper. The same current flows in both wires. The density of conduction electrons in copper is 1.1x1029 m-3; in aluminum, it’s 2.1x1029 m-3.
(a) the drift speeds
(b) the current densities in each wire.
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