Задача 30178.

When designing the device, it was necessary to calculate a solenoid, the magnetic field strength inside of which near the middle would be equal to 4*10^4 A/m. The winding is made of tightly wound wire with a diameter of 0.2 mm, which can withstand a current of no more than 1A. What is the minimum number of layers the solenoid winding will consist of?

Detailed solution with a brief record of the conditions, formulas and laws used in the solution, derivation of the calculation formula and answer.
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