The ____ moves through the magnetic field lines, this ____ a potential ____ across the coil. Because the coil is part of a ____ circuit, a current is induced. Each half-revolution, the two ends of the coil ____ from one brush to the other, because the half of the coil connected to each brush always ____ in the same direction, the direction of the induced potential difference (and also the ____ does not ____ every half rotation.

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