Question: A copper strip (n = 8.47 1022 electrons per cubic centimeter) 2 cm wide and 0.1 cm thick is used to measure the magnitudes

A copper strip (n = 8.47 × 1022 electrons per cubic centimeter) 2 cm wide and 0.1 cm thick is used to measure the magnitudes of unknown magnetic fields that are perpendicular to the strip. Find the magnitude of B when I = 20 A and the Hall voltage is

(a) 2.00 μV,

(b) 5.25 μV, and

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