OHM'S LAW

A #28 gauge wire has a diameter of 0.032 cm and a #22 gauge wire has one of 0.064 cm. Recall that the cross-sectional area of a cylindrical object, such as a wire, is given by A = (r2 where the radius r is half of the diameter. The resistivity of copper is ( = 1.72x10-6 -cm. That of German silver is = 33x10-6 … ................
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