Task 30975.
The area of the square frame S = 0.25 m ^ 2, the number of turns N = 100, the diameter of the copper (p = 1.75 * 10 ^ 8 Ohm * m) wire d = 1 mm. With what frequency should this frame be rotated around an axis perpendicular to the lines of the Earth´s magnetic field (H = 40A / m) so that the effective value of the current in it is equal to 1 mA?
Detailed solution with a short recording of the conditions, laws and formulas used in the decision, the withdrawal of the calculation formula and the answer.
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