A rectangular copper strip measures 10mm in the direction, Physics

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A rectangular copper strip measures 10mm in the direction

A rectangular copper strip measures 1.0mm in the direction of a uniform 2.9T magnetic field. When the strip carries a 7.3A current at right angles to the field, the Hall potential across the strip is 1.2muV. Find the number density of free electrons in the copper.

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Physics: A rectangular copper strip measures 10mm in the direction

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