Magnet

(noun.) (physics) a device that attracts iron and produces a magnetic field.

整理:利亚

• Gale suggested that his simple electro-magnet, with its few turns of thick wire, should be replaced by one with a coil of long thin wire. 鲁伯特·萨金特·荷兰. 历史性发明.
• If a close coil of wire is suspended between the poles of a strong horseshoe magnet, it will not assume any characteristic position but will remain wherever placed. 伯莎M.克拉克. 科学通论.
• The simplest form of electric magnet is shown in Fig. 2. 佚名. 神奇的知识之书.
• If a delicately made magnet is suspended as in Figure 223, and is allowed to swing freely, it will always assume a definite north and south position. 伯莎M.克拉克. 科学通论.
• So far Morse had only used his recorder over a few yards of wire, his electro-magnet had been of the simplest make, and his battery was a single pair of plates. 鲁伯特·萨金特·荷兰. 历史性发明.
• Iron filings scattered over a magnet arrange themselves in definite lines. 伯莎M.克拉克. 科学通论.
• The cylinder stops, and current operates the sluggish press-magnet, causing its armature to be attracted, thus lifting the platen and its projecting arm. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• The result of moisture in the interior of a magnet is to weaken the effectiveness of the installation, leading eventually to short circuits and burn-outs. 佚名. 神奇的知识之书.
• Again, plac e the magnet in a wooden vessel, and then set the vessel afloat in a tub or cistern of still water. 李贝. 西洋科学史.
• In 1840 Davenport, by means of his electric motor, printed a news sheet called the _Electro Magnet and Mechanics’ Intelligencer_. Edward W. Byrn. 十九世纪发明进展.
• As the magnet recedes from the coil, it carries lines of force away with it, this time reducing the number of the lines which cut the coil. 伯莎M.克拉克. 科学通论.
• Another form of the electric magnet is shown in cross-section in Fig. 3. 佚名. 神奇的知识之书.
• The motion of a magnet within a coil of wire produces a current of electricity. 伯莎M.克拉克. 科学通论.
• Since Oersted’s first electric magnet in 1820, electric magnets have been made in a variety of forms and for many different purposes. 佚名. 神奇的知识之书.
• These inventors conceived and put in practice the great idea of employing the current from an electro-magnetic machine to excite its own electric magnet. 威廉·亨利·杜利特. 世纪发明.
• Safety clutches are numerous, by which the machine is quickly and automatically stopped by the action of electro-magnets should a workman or other obstruction be caught in the machinery. 威廉·亨利·杜利特. 世纪发明.
• His knowledge of magnets was tremendous. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• Since Oersted’s first electric magnet in 1820, electric magnets have been made in a variety of forms and for many different purposes. 佚名. 神奇的知识之书.
• The magnets used in this river work were three and one-half feet in diameter. 佚名. 神奇的知识之书.
• Inside that bar there are several permanent magnets, packed on each side of the ends of the coil of wire, the poles of those on one side being the opposite of those on the other. 弗雷德里克·科利尔·贝克维尔. 伟大的事实.
• It was of circular form, incased in iron, with the ends of several small magnets sticking through the floor. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• The blow broke the glass carboy, and the acid ran down upon the field magnets of the dynamo, destroying the windings of one of the twelve magnets. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• The mode now generally employed to correct deviation is by introducing on board ship masses of iron and magnets to neutralize the action of the ship’s magnetism so far as possible. 佚名. 神奇的知识之书.
• Set going under adequate conditions they are magnets for gathering and retaining an indefinitely wide scope of intellectual considerations. 约翰·杜威. 民主与教育.
• The field magnets in the multipolar machine usually are arranged in radial position around the entire circumference of the revolving armature, and are held in a fixed circular frame. Edward W. Byrn. 十九世纪发明进展.
• They are operated by means of enormous magnets which are suspended at the top of the shaft. 埃德加·赖斯·巴勒斯. 火星战神.
• Both of these machines had permanent field magnets, and were early types of magneto-electric machines. Edward W. Byrn. 十九世纪发明进展.
• In this illustration, the circuit, it will be seen, passes through both the coils of the field magnets and the coils of the armature, involving the principle of mutual excitation. Edward W. Byrn. 十九世纪发明进展.
• Thus two men and two magnets did the work of twenty-eight men in less than one-fourth of the time. 佚名. 神奇的知识之书.
• It has been said that although Oersted was the discoverer of electro-magnetism and Ampère its expounder, Faraday made the science of magnets electrically what it is at the present day. 威廉·亨利·杜利特. 世纪发明.

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