Define an annular inductance coil (air core) and a

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Define an annular inductance coil (air core) and a current rise, when it has a number of windings 1200, the average radius of 5 cm, the cross-sectional area of 20 cm ^ 2. Current flows through the coil, and the induced EMF in the coil self-inductance -3 V.

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Task 31597. Detailed solution with a short recording conditions, laws and formulas used in the decision, the withdrawal of the calculation formula and the answer.
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