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action acts amount angle axis ball battery becomes body boundary called capacity cell charge circuit closed coating condition conducting conductor connected consequently consider consists constant continuous copper corresponding density depends determined dielectric difference of potentials direction discharge distance effect electric field electric force electrified electrified body electromotive force element energy equal equilibrium existing experiment expressed extending fact flux follows given gives glass hand heat Hence increase induction inner inside insulated intensity kind known less lines of force machine magnetic magnetisation material means measured metal move negative opposite outer parallel passes piece plane plate poles portion positive produced properties proportional quantity quantity of electricity represented resistance respectively result separate side spark sphere strength suppose surface taken takes place temperature terminals transfer tube unit whole wire zinc
Page 458 - As a unit of resistance, the international Ohm. which is based upon the ohm equal to 109 units of resistance of the CGS system of electro-magnetic units, and is represented by the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice, 14.4521 grammes in mass, of a constant cross-sectional area, and of a length of 106.3 centimetres.