Practical applied electricity; a book in plain English, for the practical man. Theory, practical applications and examples (1911)
Moreton, David Penn, 1882- · Chicago, The Reilly & Britton co · leaf 151
into such a positionthat its magnetic field is parallel to the magnetic field pro-duced by the current in the stationary coil. This movablecoil, however, is brought back to its zero position by turningthe thumb screw, which is connected to the upper end of thespring, causing the spring to be… … Fig. 104
Electrical engineering
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