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# The cross section of a copper strip is 1.2 mmthick and 30 mm wide. There is a 15-A current through this cross section, with the charge carriers...

The cross section of a copper strip is 1.2 mmthick and 30 mm wide. There is a 15-A current through this cross section, with the charge carriers traveling down the length of the strip. The strip is placed in a uniform magnetic field that has a magnitude of 4.0 T and is directed perpendicular to both the length and the width of the strip. The number density of free electrons in copperis 8.47 ×1019mm−3.

Calculate the potential difference across the strip width.