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A long cylinder with uniformly charged s...

A long cylinder with uniformly charged surface and crosssectional radius `a = 1.0 cm` moves with a constant velocity `v = 10 m//s` along its axis. An electric field strength at the surface of the cylinder is equal to `E = 0.9 kV/cm`. Find the resultign concection current , that is, the current caused by mechanical transfer of a charge.

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