Polarity
[pə(ʊ)'lærɪtɪ] or [pə'lærəti]
解释:
(noun.) having an indicated pole (as the distinction between positive and negative electric charges); 'he got the polarity of the battery reversed'; 'charges of opposite sign'.
伊莉斯校对--From WordNet
解释:
(n.) That quality or condition of a body in virtue of which it exhibits opposite, or contrasted, properties or powers, in opposite, or contrasted, parts or directions; or a condition giving rise to a contrast of properties corresponding to a contrast of positions, as, for example, attraction and repulsion in the opposite parts of a magnet, the dissimilar phenomena corresponding to the different sides of a polarized ray of light, etc.
(n.) A property of the conic sections by virtue of which a given point determines a corresponding right line and a given right line determines a corresponding point. See Polar, n.
安东尼娅手打
例句:
- It will be seen, therefore, that this method of duplexing is practiced, not by varying the strength or polarity, but by sending TWO KINDS OF CURRENT over the wire. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
- If the direction is reversed, the polarity will also be reversed. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
- If the earth is at present magnetical, in virtue of the masses of iron ore contained in it, might not some ages pass before it had magnetic polarity? 本杰明·富兰克林. 富兰克林自传.
- If the direction of flow of current be reversed, by reversing the battery, the electromagnetic polarity also reverses and the end of the permanent magnet swings over to the other side. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
- An essential part of this relay consists of a swinging PERMANENT magnet, C, whose polarity remains fixed, that end between the terminals of the electromagnet being a north pole. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
- It is immaterial which way the wire is wound around the bar, the determining factor of polarity being the DIRECTION of the current. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
埃维塔校对