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A long straight solenoid of cross-secti...

A long straight solenoid of cross-sectional diameter `d = 5 cm` and with `n = 20` turns per one cm of its length has a round turn of copper wire of cross-sectional area `S = 1.0 mm^(2)` tightly put on its winding. Find the current flowing in the turn if the current in the solenoid winding is increased with a constant velocity `dotI = 100 A//s`. The inductance of the turn is to be neglected.

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