Furthermore, when desired, the batteries may be so connected in circuit that reverse currents shall be passed through the magnets every time the batteries are changed.
The earth acts upon all magnets as they act upon each other, and it is for this reason that they point north and south.
The effect of the former can be counteracted bymagnets suitably placed near the compass, that of the latter by spheres of soft iron.
What do you know about magnets and magnetism and electromagnets?
Didn't know magnets had anything to do with electricity!
The human body is of elements the same as a magnet and is built of smaller magnets or molecules.
Nature builds up, tears down, and reproduces her organic forms on the surface of planetary globes, but she does not destroy her great sun magnets and world magnets in the same manner, as many of our scientists think.
Professor Fleming in his book, "Magnets and Electric Currents" says: "Magnetic bodies become changed into feeble magnetic ones by heating to a certain temperature.
Second--These creative cosmic forces, by condensing the suns and planets into vast magnets revolving in a sea of electro-magnetic forces, evolved the marvelous machinery of the universe.
The molecules are composed of invisible magnetscalled atoms.
It is produced by chemical action, differences of temperature, the motion of conductors and magnets and the various physical and chemical processes that occur during the life and growth of plants and animals.
The cells of protoplasm are infinitesimalmagnets or electrical machines, all vegetables are but larger magnets, all animals still larger, till we get to worlds and suns, the greatest of them all.
Sixth--The sun and planets are vast magnets because they are held in charge of electro-magnetic forces in an immense magnetic field.
Magnets attract only when their poles are reversed, or when they are oppositely electrified, and suns and planets do the same.
I carried my magnetsand iron correctors to Deptford, mounted them in the proper places, tried the ship, and the compass, which had been disturbed 50 degrees to the right and 50 degrees to the left, was now sensibly correct.
These wires and magnets can be made to attract the little ball into any pocket the operator desires.
Craig was still standing by the table, but now the pendulums with the magnets and needles and the drums worked by clockwork were before him.
His forefinger indicated an ingenious, but now tangled and twisted, series of minute wires and electro-magnets in the broken wheel before us.
One set of magnets in the red pockets is connected with one button under the carpet and a battery.
Whichever set of electro-magnets is energised attracts the ball and by this simple method it is in the power of the operator to let the ball go to red or black as he may wish.
Generally speaking, magnets are of two kinds, namely, permanent and electro-magnetic.
D of the armature are closely approaching the positive and negative magnets, on one side; and the positive magnets C are nearing the positive and negatives on the other side.
By using a pair of magnets and sending a current through the coils, and then measuring the pull on the armature.
A simple way to make a pair of magnets for this purpose is shown in Fig.
Let us assume that the field magnets A, A are the positives, and the magnets B, B the negatives.
After the armature magnetshave gone to the positions in Fig.
Midway between the magnets and the rear end of the base is a pair of upwardly projecting brackets (C).
By removing the obstructions to the electric current and reducing resistances in wires, magnets and batteries to a minimum, the great possibilities of the wires were discovered in accomplishments which were never dreamed of.
The magnets were soon after greatly improved, reduced in size, and increased in power.
We have briefly referred to the action of magnets on the muscles in speaking of the physiological phenomena, but they possess other properties which hardly come under that head.
These experiments with magnets are very exhausting.
The supporting power of these magnets was the greater the nearer its constituent plates were to each other.
Each strip of platinum communicates, through a special wire, with one of the electro-magnets of the registering device (Fig.
It consists of a hollow coil of silk-covered wire, in the heart of which a tiny mirror, with several small magnets cemented to its back, is suspended by a single thread of floss-silk fibre.
When the stop pin has passed the spring, the connection through the magnets T is broken and the clockwork F stops instantly.
The magnets 2 should cause the clapper to strike once on the gong V when the current is on, and to make one stroke on the gong W when the current is broken.
This wire is to make contact with the spring M when the armature is drawn by the magnets J, and with N when drawn by the magnets H.
The connections to the bell magnets 1, 2, and 3 should be direct to the binding posts so that the armature will not vibrate, but give one stroke.
A pair of magnets of about 50 ohms are mounted on this support.
The magnets 3 produce only one stroke on the gong X at a time, which is used to sound the hours.
These lines will be concentric circles, as a general rule, except when they are distorted by the presence of other magnets or magnetic materials, and their direction will be clockwise.
I avail myself of the earliest moment to acknowledge its receipt, and to thank you for the box of magnets which I found here.
Being in want of a set of magnets also, I would be glad if he would at the same time send me a set, the case of which should be made as Dr.
The poles of the magnets are applied near the side and edges of these plates, and then the number of vibrations, required to reduce the vibrating arc a certain constant quantity, noted.
Other electro-magnets could be made at pleasure by introducing a soft iron rod into any of the helices described (1053, &c.
In considering the nature of the cause assigned in these papers to account for the mutual influence of magnets and moving metals (120.
As all the effects can be produced by ferruginous electro-magnets (34.
Upon obtaining electricity from magnets by the means already described (36 46.
The similarity of action, almost amounting to identity, between common magnets and either electro-magnets or volta-electric currents, is strikingly in accordance with and confirmatory of M.
As the above results are common to all these experiments, and to similar ones with ordinary magnets to be hereafter detailed, they need not be again particularly described.
Davy[A], the current deflected the needle and made magnets under the same law, as to direction, which governs currents of ordinary and voltaic electricity.
Thus the different effects of short wires, long wires, helices, and electro-magnets (1069.
Here therefore was demonstrated the production of a permanent current of electricity by ordinary magnets (57.
Native magnets from Arabia, China, and Bengal are commonly of a reddish colour, and are powerfully attractive.
Several horse-shoe magnets are attached to two endless chains, moving over suitable wheels, and inclined at an angle of 30 degrees.
Eschenhagen[2] first designed a set of magnetographs in which this idea of small moment of inertia was carried to its useful limit, the magnetsonly weighing 1.
In the Eschenhagen form of vertical force balance two deflectingmagnets are used to partly neutralize the vertical component, so that the centre of gravity is almost exactly over the support.
It is, however, possible by suitably choosing the proportions of the two magnets to cause either P or Q to be very small.
By varying the positions of these deflecting magnets it is possible to compensate for the effects of changes of temperature (A.
Further, to allow of a correction being applied for the finite length of the magnets the whole series of settings is repeated with the centre of the deflecting magnet at 40 cm.
The axis of the magnet is horizontal and at the same level as the mirror magnet, while when the central division of the scale B appears to coincide with the vertical cross-wire of the telescope the axes of the two magnets are at right angles.
Thus it is usual, if the magnets are of similar shape, to make the deflected magnet 0.
It was not until it was learned that magnets could be made by electricity that they became commercially important outside of their use in navigation.
When the iron is in the neutral state it will not as a mass attract another piece of iron, because the millions of little natural magnets of which it is made up have their attractive force all turned in upon themselves.
That is to say, the molecules are little natural magnetsof themselves.
We may make other magnets with it, thousands, yea, millions of them, and it not only does not lose its power but may be even stronger for having done this work.
When the "keeper" was put on the poles of the magnet it was magnetized by having its molecular rings broken up and the poles of the little natural magnets all turned in one direction.
In this way all the levers of all the magnets are made to follow the motions of any key.
It is as unnecessary to inquire why they are magnets as it is to inquire why the molecules of all ordinary substances possess the attraction of cohesion.
If there are more than two magnets in circuit (and there may be twenty or more) they all respond in unison to the working of one key, so that when any one station is sending a dispatch all the other stations get it.
The millions of little naturalmagnets have been forced to combine their attractions into one whole and exert it on something outside of themselves.
In other cases the armature revolves and the field-magnets are stationary.
He also stated that he had not supplied any of these magnets for two or three years.
He said that for years he had been in the habit of supplying magnets for the production of rapping sounds at spiritual séances.
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.
The revolving coils of the dynamo are called the armature, and the fixed electro-magnets are called the field magnets, and these latter may be two or more in number.
In 1853 Bonelli sought to improve on the Jacquard mechanism by employing electro-magnets to effect the selection of the needles, instead of perforated cards (British patent No.
Joseph Henry produced his energetic electro-magnets sustaining weights of some thousands of pounds, and gave prophetic suggestion of the possibilities of electricity as a motive power.
By the mutual action between the electro-magnets and the armatures an accelerating force is obtained, which in result produces electricity greater in quantity and intensity than has heretofore been obtained by similar means.
These magnets deflect the fall of the particles rich in iron (which are attracted), while the non-magnetic particles of sand drop straight down.
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.
Less wire and magnetizing current are required for the field magnets for a given output than with the ring armature.
This type of motor is devised to prevent sparking at all loads by the use of interpole magnets, that is, small magnets placed between the field magnets.
In the operation of a motor the reaction between the armature and field magnets distorts the field in a similar manner as in the operation of a dynamo.
In the figure one of these magnets is considered as above the paper, and the other below.
The treatment of disease by the application of magnetsto the surface of the body.
The description is as follows: Let A A, in the prefixed engraving, represent two magnets revolving on axes.
B B are blocks of wood to keep off the attraction of the magnets from that part of the wheel which has passed them.
This effect is produced by two magnets A and B, acting alternately upon a needle m n, of which the point of attachment n corresponds exactly with the axis around which turns the movable lever C D.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "magnets" in a variety of sentences. We hope that you will now be able to make sentences using this word.
