Electricity and magnetism : an elementary text-book, theoretical and practical (1920)
Glazebrook, Richard, Sir, 1854-1935 · Cambridge : The University press · leaf 280
e known wecan find the fourth R, while clearly it is not necessary to knowthe actual values of P and Q provided the ratio PjQ is known. We may arrive at the same result graphically thus: Let AG, GB, Fig. 165, represent two resistances P, Qrespectively. Let AL a.t right angles to AB be the e. m. f.… … Fig. 165. Again let AD represent R and DB^ S, D being the pointon ADB which is at the same potential as C, and construct asimilar figure for the circuit A DB. It is clear from the figurethat there is such a point, for A and A are at the same potentialas also are B and B. Then since the e.m.f.…
Electricity · Magnetism
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