Elementary lessons in electricity and magnetism (1906)
Thompson, Silvanus P. (Silvanus Phillips), 1851-1916, Schwetzky, Otto H. L. [from old catalog] · Chicago, Thompson & Thomas · leaf 445
Pig. 170. is heard in the telephone. But a perfect balance cannotbe obtained unless the resistances and the co-efficients ofmutual induction and of self-induction are alike. If a flatpiece of silver or copper (such as a coin) be introducedbetween Si and P^ there will be less induction in Si thanin…
Electricity · Magnetism
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