In a cross-section of the copper plate thickness d = 0,2 mm skipped current I = 6 A. The plate is placed in a uniform magnetic field with induction B = 1 T perpendicular to the edge of the plate and the direction of the current. Considering the concentration of the conduction electrons of equal concentrations of atoms arising in the record to determine the transverse (Hall) a potential difference. The density of copper, 8.93 g / cm ^ 3.

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