Among many minor observations, he discovered in 1842 the oscillatory nature of the electrical discharge, magnetizing about a thousand needles in the course of his experiments (Proc.
This was the first instance of magnetizing iron at a distance, or of a suitable combination of magnet and battery being so arranged as to be capable of such action.
When the current comes and applies a magnetizing power, it finds the magnetic circuit already complete in the sense that there are no absolute gaps.
You do not add to the total number by reducing the magnetic reluctance, because you are not working under the influence of a constantly impressed magnetizing force.
To apply equal magnetizing power by means of an iron coil implies the expenditure of about six times as many watts as need be expended if the coil is of copper.
In short pieces, where these mutual actions are feeble or almost absent, the magnetization is less stable, and disappears almost instantly on the cessation of the magnetizing force.
The lag is not in the iron, but in the magnetizing current, and the current being retarded, the magnetization is of course retarded also.
You get more magnetic lines round the bend when you put an armature on to the poles, because you have a magnetic circuit of less reluctance with the same external magnetizing power in the coils acting around it.
Clearly, then, such a magnet must have a very large magnetizing power, with many ampere turns upon it, to be able to make the required number of magnetic lines pass across the air resistance.
The magnetizing coil becomes large and difficult to support in place, and would be hard to repair in case of breakdown.
The permeability of a given sample of iron is not constant, but decreases in value as the magnetizing force increases.
This loss of energy is due to the work required to change the position of the molecules of the iron, and takes place both in the process of magnetizing and demagnetizing; the magnetism in each case lagging behind the force.
What effect has the cross magnetizing force on the field?
Hence, the inductors lying outside the two upright lines are known as cross magnetizing turns, and those lying inside, as demagnetizing turns.
Less wire and magnetizing current are required for the field magnets for a given output than with the ring armature.
The experiment can be further varied by reversing the magnetizing current of the electromagnet.
The magnetizing current of a transformer is sometimes spoken of as that current which the primary winding takes from the mains when working at normal pressure.
This automatic action of the transformer is due to the balancedmagnetizing action of the primary and secondary currents.
The true magnetizingcomponent is small if the transformer be well designed, and be worked at low flux density.
In addition to this, there is a magnetizing coil along the same axis, which is connected across the mains and so produces the same flux as the primary coil in a shunt induction machine.
The relation between these two components determines the power factor of the so called "magnetizing current.
The true magnetizing current is only that component of this total no load current which is in quadrature with the supply pressure.
The alternating magnetizing current is assumed to be of such strength that, at its maximum strength, the field produced may be represented by 10 lines of force as indicated by the parallel lines.
The core B has a shorter return path than A and C, which causes the magnetizing current in that phase to be less than in the A and C phases.
The small radial depth of the stationary armature makes possible a revolving field of maximum diameter giving in turn an exceptionally large air gap area, which reduces the magnetizing current, hence improves the power factor of the motor.
PAGE 165 deals with the construction; the process of magnetizing by the loadstone had already been discussed in pp.
There is a curious history to this picture of the blacksmith in his smithy striking the iron while it lies north and south, and so magnetizing it under the influence of the earth's magnetism.
It is now well known that the specific amount of magnetism retained by elongated forms exceeds that in a short piece of the same material subjected to equal magnetizing forces.
It is a well known fact that the molecular disturbance produced in a mass of iron by the magnetizing influence of an intermittent electrical current can be observed as sound by placing the ear in close contact with the iron.
Von Feilitzsch in 1856 in his researches on the magnetizing influence of the current.
K is a commutator for reversing the direction of the magnetizing current, and G a galvanometer for measuring it.
The effects of pulling stress may be observed either when the wire is stretched by a constant load while the magnetizing force is varied, or when the magnetizing force is kept constant while the load is varied.
Between the magnetizing coils is a small induction coil D, which is connected with a ballistic galvanometer.
The effect of these is beautifully illustrated by a model consisting of a number of little compass needles pivoted on sharp points and grouped near to one another upon a board, which is placed inside a large magnetizing coil.
If l1 were exactly equal to -2l2 for all values of the magnetizing force, it is clear that the volume of the ring would be unaffected by magnetization.
Frisbie,[44] who found that for the magnetizing forces used by Nagaoka and Honda pressure produced a small increase of magnetization, a result which appears to be in accord with theory.
If this be too large, the cross and back magnetizing force of the armature weakens the field more than the initial field current strengthens it, and so the machine cannot build up.
On one occasion, thinking that they had been magnetizing him for ten minutes, this same doctor fancied that he felt a heat in his lumbi, which he compared to that of a stove.
Sensations thus felt, when no magnetizing was exerted, must evidently have been the effect of imagination.
Puysegur was probably the first to discover this peculiarity: he was humming to himself a favorite air while magnetizing a peasant boy, and suddenly the latter began to sing the same air with a loud voice.
In like manner women are more easily controlled than men, and hence more capable of being magnetized than of magnetizing others.
This is all the more frequently noticed as many magnetizers look upon convulsions as efforts made by nature to restore the system to a healthy condition, and hence excite in their patients convulsions without magnetizing them fully.
Plutarch even speaks of magnetizing by touching with the feet, as practised by Pyrrhus.
They succeed only in so magnetizing his body that it is impossible for him to die.
As the machine approaches synchronism~, however, the magnetizing current of the induction motor drops to a very much lower value than in the synchronous motor and the power factor is consequently much higher.
The synchronous condenser, therefore, can supply magnetizing current to the load on a system while the power component is supplied by the generators.
The magnetizing coils FG are in series with the load.
The magnetizing current is nearly constant at all loads and is wattless, lagging 90 degrees behind the impressed pressure, or at right angles to the current which is utilized for power.
Since transformers require the magnetizing current, they may seriously affect the power factor when unloaded or partially loaded, but when operating at full load their effect is practically negligible.
What kind of magnetizing flux is produced by the primary windings?
This magnetizing current is obviously equal to the circuit current of the machine at no load field.
The high magnetizing current~ of a synchronous motor should not be lost sight of as it is a very important consideration in starting the machine.
In the figure, AB is the magnetizing component, which is always wattless, and CB the power component.
The obvious thing to do is to get the field on the motor while still on the compensator, whenever possible, to avoid the high magnetizing current.
The magnetizing current of the induction motor at full speed is usually 25 per cent.
The unbalanced neutral current flowing in this system may be compared in action to the effect of a magnetizing current in a transformer.
When a direct current is passed through the transformer, unless the fluxes produced by the same neutralize one another, its effect on the transformer iron varies as the magnetizing current.
The difference in the two curves is due to the lag of the magnetization behind the magnetizing current, and is caused by the hysteresis of the iron of the armature core.
This reasoning is based on the possibility in this case of cutting off the current in the magnetizing coil and retaining the magnetic field.
The process of electrifying a body is very different from that of magnetizing it.
The magnetizing of a piece of iron or steel by a magnet near or touching it is called magnetic induction.
This indicates that soft-iron molecules are easily swung into line, but also disarrange themselves as easily when removed from a magnetizing force.
The action of magnetic lines of force in magnetizing iron when they pass through it, is called Magnetic Induction.
Increasing the strength of the magnetizing field, gives stronger magnetization to the iron up to a certain point.
Its magnetism, however, is quickly lost when the magnetizing field is removed.
After this, stronger fields give no increase in magnetizing effect.
In several of the foregoing paragraphs it has been seen that a piece of iron or steel when once magnetized does not entirely lose its magnetism when the magnetizing force is removed.
The same may be shown by magnetizing a needle, rubbing it first in one direction, and then in another upon the magnet, testing, in each case, the poles produced.
When the molecules of hard steel are once arranged, by magnetizing them, for example, they strongly resist any outside influences which tend to mix them up again.
It is a remarkable fact that certain varieties of low carbon steel (commonly called mild steel) have a higher permeability than even annealed Swedish wrought iron under large magnetizing forces.
In the latter some of the transformers can be switched off, either by hand or by automatic apparatus, during the time when the load is light, and then no power is expended in magnetizing their cores.
It will be seen that a magnetizing force of about 5 C.
Swedish wrought iron, and enables us to obtain a higher flux density corresponding to a given magnetizing force with the steel than with the iron.
Magnetic Flux Density corresponding to various Magnetizing Forces in the case of certain Samples of Iron and Steel (Ewing).
Magnetic Permeability of Samples of Iron and Steel under Weak Magnetizing Forces.
It will be seen from the figures and the description of the materials that the steel forgings and castings have a remarkably high permeability under small magnetizing force.
However, by properly designing the generator and determining the magnetizingeffect of the primary coils, the latter element may be made to disappear.
On the other hand, no such opposition being encountered in the other set of coils, the current passes freely through them, magnetizing the poles on which they are wound.
The sections C, on the other hand, are protected from the magnetizing influence of the coil by the interposed layers of iron B B.
F F are the main energizing coils, supported by the supporting-frame, so as to include within their magnetizing influence both the pole-pieces C C' and the armature D.
Between the cores or their polar extensions is mounted a cylindrical or similar armature F, wound withmagnetizing coils G, closed upon themselves.
When the joints are made in this way, they offer less opposition to the magnetizing force.
Make sure to wind both ends of the armature in the same direction so the current in both parts of the winding produces magnetizingeffects in the same direction.
Unable to attend all the patients who applied to him, he followed Mesmer's plan of magnetizing a tree.
While the Marquis de Puységur was using the elm tree near Soissons, the Chevalier de Barbarin was successfully magnetizing people without paraphernalia.
At this time Lavater paid a visit to Bremen and exhibited the magnetizing process to several doctors.
When Mesmer left Paris, the marquis retired to his estate near Soissons, and employed his leisure in magnetizing peasants.
You told me that Bemis very nearly wrecked a train by magnetizing the levers at the depot switch tower.
Bemis had thrown on the current, magnetizing the new leverman at just the critical moment.
The magnetizing process gave rise to peculiar sensations which were attributed to the action of the magnetic fluid.
In much the same way Mesmer, more than a hundred years ago, administered to the practice which had exhausted the capacity of his personal attention, bymagnetizing trees and selling magnetized water.
It is unnecessary to repeat here that processes pointed out for magnetizing water, like everything else, would be absolutely useless, if they were not employed with attention and with a determinate will.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "magnetizing" in a variety of sentences. We hope that you will now be able to make sentences using this word.
