Solution to task 478 from Chertov´s for extramural stud

Solution to task 478 from Chertov´s for extramural stud

478. The circuit consists of a coil with inductance L = 0.1 H and a current source. The power supply was disconnected without breaking the circuit. The time after which the current will decrease to 0.001 of the initial value is t = 0.07 s. Determine the coil resistance

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