The circuit consists of a coil and a current source.

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The circuit consists of a coil and a current source. Coreless solenoid 15 cm long and 4 cm in diameter has a dense winding of two layers of copper wire of 0.2 mm diameter. As the solenoid current flows 1 A. Determine self-induction EMF in the solenoid at the time point after disconnecting it from the power source when the current strength halved. Impedance current source and the leads to neglect.

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Task 31141. Detailed solution shorthand terms, formulas, laws used in the decision, the withdrawal of the calculation formula and the response.
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