Задача 30223.

The number of turns in the solenoid is N = 800, its length is l = 20 cm, and its cross section is S = 4 cm^2. At what rate of change of current in a solenoid without a core is the maximum self-inductive emf equal to 0.4 V induced?

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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