Electricity and magnetism : an elementary text-book, theoretical and practical (1920)
Glazebrook, Richard, Sir, 1854-1935 · Cambridge : The University press · leaf 105
at the same potential its equilibrium is not affected; if, how-ever, there be a difference of potential between A and B, eachend of the needle, if its own potential be positive, is repelled 61-62] MEASUREMENT OF POTENTIAL 95 from the quadrants at high potential towards those at low,the needle… … Fig. 55. In practice the quadrants are doubled, a set being placedover as well as below the needle, the corresponding quadrantsbeing connected together, so that the needle is practicallyentirely surrounded and hangs in a kind of hollow box. To measure the deflexion of the needle a mirror is…
Electricity · Magnetism
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