Задача 31702.

A current of 20 A flows through the section S = a * b of the copper plate with a thickness of a = 0.5 mm and a height of b = 10 mm. When a plate is placed in a magnetic field perpendicular to rib b and the current direction, a transverse potential difference of 3.1 μV occurs. Induction of a magnetic field of 1 T. Determine: the concentration of electrons of copper, the average speed of the directional movement of electrons.

Detailed solution with a brief record of the conditions, formulas and laws used in the decision, the conclusion of the calculation formula and the answer.
If you have any questions about the decision, write. I will try to help. File in image format.