Supposing it is desired to make an electromagnet which shall be capable of undergoing very rapid changes of strength, it must have such a form that the coercivity of the material is overcome by a self-demagnetizing force.
It has already been explained that the ends or poles of a polar magnet exert a demagnetizing power upon the mass of the metal in the interior of the bar.
If a soft iron mass does quite touch the poles, then it completes the magnetic circuit and abolishes the free poles, and the magnet is to a very large extent deprived of its self-demagnetizing power.
It is probable that Hopkinson did not attach sufficient importance to the demagnetizing action of the cut (cf.
Since Hi generally tends to oppose the external force, thus making H less than H0, it may be called the demagnetizing force.
The demagnetizing force inside a cylindrical rod placed longitudinally in a uniform field H0 is not uniform, being greatest at the ends and least in the middle part.
In all such measurements a correction should be made in respect of the demagnetizing force due to the joint, and unless the fit is very accurate the demagnetizing action will be variable.
The residual magnetization Ir retained by a bar of ferromagnetic metal after it has been removed from the influence of an external field produces a demagnetizing force [N]Ir, which is greater the smaller the dimensional ratio.
On the other hand, if the winding were concentrated in fewer slots and these slots were closer together, the result will be an increase in distorting and demagnetizing reactions of the armature.
This, however, would accentuate the distorting and demagnetizing reactions of the armature.
This illustrates the effect of a lagging current in demagnetizing the field magnets and in increasing the dispersion.
The breadth of the belt of demagnetizing turns included between the two upright lines is clearly proportional to the angle of lead; therefore, the demagnetizingeffect increases with the lead.
It produces a demagnetizing effect which tends to weaken the field magnets.
Hence, the inductors lying outside the two upright lines are known as cross magnetizing turns, and those lying inside, as demagnetizing turns.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "demagnetizing" in a variety of sentences. We hope that you will now be able to make sentences using this word.
