Electricity and magnetism : an elementary text-book, theoretical and practical (1920)
Glazebrook, Richard, Sir, 1854-1935 · Cambridge : The University press · leaf 276
at the box is such that it ispossible to find a resistance <S in it equal to the given re-sistance. Clearly this is not always possible, but if the boxis divided to ohms we can find two resistances aS^ ohmsand S + I ohms between which R must lie. This will oftenbe sufficiently accurate for our… … Fig. 163. through B, the standard *S is out of circuit; with K and K^in connexion the current passes through S, the unknowncoil is out of circuit. The formula given above assumes that a tangent galvano-meter is used ; this may in practice be replaced with advantageby a direct reading ammeter;…
Electricity · Magnetism
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