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 198
ch current then really flows, through the heater? ELECTRICAL MEASURING INSTRUMENTS 169 123. Other types of ammeters. Currents which rapidlyalternate in direction, as do the currents of many electric-light plants, cannot be measured by magnetic instruments hav-ing permanent magnets, since the… … Fig. 104. — Thomson inclined coil meter. used on either direct-current (d-c.) or alternating-current (a-c.)circuits and this is the moving-iron and fixed-coil type ofammeter. One form, known as the Thomson inclined coilmeter because designed by Mr. Elihu Thomson, is shown infigure 104. In this…
Electricity · Magnetism
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