An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 342
—~*m-Q Fig. 214. — Diagram of es-sential parts of oscillograph. Vertical Axis … motor, there is a sidewise push exerted bythe magnetic field, which is just opposite indirection in the two sides of the loop. Butthe next instant the current reverses in theloop, and so the sidewise thrust on the sidesof the loop is reversed. The result is thatthe tiny mirror M is continually…
Electricity · Magnetism
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