electropolar (elektropolar)

Having, as an electrical conductor, one end or surface pos i tive and the other negative. electropositive (ē-lek-tro-poz'i-tiv), a. and n. I. a. 1. Attracted by bodies negatively electrified, or by the negative pole of a voltaic battery.-2. A uming positive potential when in contact with another substance, as zinc in a voltaic cell. II. n. A body which in electrolysis appears at the negative pole of a voltaic battery. ta ium is the most electropositive of all known bodies. See electrolysis. IMG:content-0297.png:[blocks in formation] Pith-ball Electroscope. Quadrant Electroscope. upper end of the rod is furnished with a knob. If an electrified body is brought near the top of the instrument, induction takes place; the top becomes electrified oppositely to the body presented, and the pieces of similarly. To find if the latter are positively or negatively charged, a gla rod is rubbed and brought near the knob; if positively charged, the leaves will diverge still more under the induction of the gla ; if negatively, they will collapse, the negative electricity being attracted to the positive of the gla rod. In Volta's condensing electroscope, in place rests another similar plate, which may be removed by an of the gilt knob there is a flat metal plate upon which insulating handle. - Quadrant electroscope, a form of pith ball electroscope aceh bah is degree of electrification by rise of pith-ball indicated by the motion of the rod carrying it on a gradu ated semicircle.