Rotary motion with an electromagnet and a permanent magnet.
Rotary motion with a hollow coil of wire and a permanent magnet.
A bar of steel which is not magnetic, being placed in the same position, relatively to the pole of the earth, which the magnetic needle assumes, and in this position being heated and suddenly cooled, becomes a permanent magnet.
The electro-magnet exerts its force in the same manner as a permanent magnet, so far as attraction and repulsion are concerned, and it has a north and a south pole, as in the case with the permanent magnet.
The removal of magnetism from a permanent magnet, or a horse-shoe magnet, for instance.
A permanent magnet is a piece of steel in which an electric force is exerted at all times.
A permanent magnet and a revolving armature for generating a current.
The ordinary, permanent magnet, natural or artificial, has little place in the arts.
Across the opposite end of this polarized [Footnote: "Polarized" means magnetized; having the two poles of a permanent magnet.
Therefore if a wire be led away from each pole of a permanent magnet, and the ends united to form a circuit, an induced current will appear in this wire if a piece of soft iron is passed quickly near the magnet.
We can do this with an electromagnet, but not with a permanent magnet, because we cannot easily regulate the amount of magnetism which a permanent magnet will give.
The steel magnet is called a permanent magnet, and its ends, or "poles," are named North and South.
Although iron will not become a permanent magnet, like steel, it does not lose all its magnetism after it has been once thoroughly charged.
This horseshoe is now a permanent magnet--that is, it will always attract and hold pieces of iron and steel.
Extension of a Permanent Magnet] "Why the ringer rings" may be gathered from a study of Figs.
This field is usually provided by a permanent magnet, hence the name "magneto-generator.
It is easier to repair, and more portable owing to the fact that the magnetic field is produced by a permanent magnet instead of an electro-magnet.
The wire will in fact become temporarily magnetized by induction, that end of it which is nearest to the pole of the magnet acquiring opposite polarity, and behaving as if it were the pole of a permanent magnet.
Even a permanent magnet is susceptible of induction, its polarity becoming thereby strengthened, weakened, or possibly reversed.
The magnetic lines pass from the S-pole to the N-pole through the coil and from the N-pole to the S-pole outside the coil, just as they do in a permanent magnet.
Compass Needle Test] It is not necessary that the magnetic field be created by a permanent magnet.
Moreover, if a permanent magnet be heated to a red heat, its magnetism is destroyed; for such a heat allows the molecules to freely arrange themselves without any external constraint.
A permanent magnet made by Jamin of Paris, which is made up of many strips of thin steel bound together, and weighing four pounds, is able to support a weight of one hundred pounds; but Dr.
In one case a permanent magnet is thrust into a coil of wire, and in the other a piece of iron is made a magnet while enclosed in a coil.
A soft iron needle N, is pivoted inside of a coil C, and is held out of line with the axis of the coil by means of a permanent magnet M, when the instrument is idle.
The coil, which is rectangular in section is wound upon a copper form, and suspended between a permanent magnet by fine wires to the points A and B.
Remember, therefore, that for a permanent magnet, use the hardest steel, and for a temporary one, the softest iron.
George took a hand in the work, and while they were preparing the metal for the little bar, said: "You spoke about a permanent magnet.
A permanent magnet is one in which the electricity resides, or remains, as it does in the earth.
Then as we want to make a permanent magnet, must we harden both of the bars?
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "permanent magnet" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
