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Magnetism |
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Armature core, magnetic hysteresis "Magnetic hysteresis in armature core. Unlike poles are induced in the core opposte the poles of the field magnet. Since on account of the rotation of the core the induced poles are reversed a thousan... |
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Armature, magnetic lines "Distribution of magnetic lines through a ring armature. Since the lines follow the metal of the ring instead of penetrating the interior no electromotive force is induced in that portion of the winki... |
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Azimuth "The horizontal angular distance between two meridians. Magnetic A. the horizontal angular distance of the magnetic from the geographical meridian. A. compass; a variety of ship's com... |
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Current, solenoid "Action of current on solenoids. To demonstrate this fact experimentally, a solenoid is constructed as shown...Te solenoid is then moveable about a vertical axis, and if a rectilinear current QP be pa... |
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Dipping Needle "Dipping needle, a magnetic needle mounted on a horizontal support, and free to move in a vertical plane. The dipping needle is used to test the force of the earth's magnetism at different places on i... |
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Electromagnet "Magnets so construted as to be temporarily magnetized in this way are called electromagnets" -Atkinson 1903... |
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Electroscope Attraction and Repulsion "Pith ball pendulum or electroscope; the figures illustrate also electrical attraction and repulsion." -Hawkins, 1917... |
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Field, magnetic "Around a vertical conductor carrying a heavy current, place a peice of paper and sprinkle iron filling on the paper. Notice that the iron particles arrange themselves in distinct circular whirls arou... |
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Field, magnetic "If the conducting wire is bent into the form shown, the lines of force will pas around the wire from one face of the loop to the other, and in the direction indicated by the 'rule of thumb' just give... |
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Horseshoe electromagnet A magnet that is the shape of a 'U' or a horseshoe type shape. Wires wound around the core must be wound as shown, with a bridge between the two poles.... |
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Isogonic lines "The magnetic poles of the earth do notc oincide with its geographical poles and, condequently, in some places, the magnetic needle does not point ot the geographical north. The angle that the axis of... |
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Lenz's Law "Experiment illustrating Lenz's Law. If a copper ring be held in front of an ordinary elecromagnet, and the current circulating through the coil of the magnet be in such a direction as to magnetize th... |
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Lines of force "Lines of force of a circular loop. If a current flow through the loop in the direction indicated, the lines of force both inside and outside the loop, will cross the plane of the loop at right angles... |
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Lines of force "Lines of force in a circular loop. If the loop pass through a piece of cardboard at right angles to its plane, and the curent flow as indicated, the dotted lines on the cardboard will represent the d... |
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Magnet A bar or mass of steel or iron to which the peculiar properties of the loadstone have been imparted, either by contact or by other means.... |
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Magnet "The coils of wire may begin near one pole of the magnet and terminate near the other, or the wire may consist of shorter pieces wound over each other, on any part of the magnet. In either case, the ... |
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Magnet, breaking "If a magnet is cut or broken into two or more pieces, each piece becomes a separate magnet, with north and south poles in the same relative positions as in the original magnet...But if the pieces be ... |
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Magnet, horseshoe "The two most common forms of artificial magnets are the bar magnet and the horseshoe magnet. The first of these is a straight bar of iron and steel; the second is U-shaped." — Avery, 1895... |
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Magnet, seperating "Effect of breaking a magnet into several parts. If a magnetized needle be broken, each part will be found to be a complete magnet having a N and S pole." -Hawkins, 1917... |
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Magnetic field "The region about a magnet in which its magnetic forces can be detected is called the magnetic field. This can be graphically represented by placing a piece of cardboard over the magnet and sprinkling... |
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Magnetic field "Tracing lines of force with a suspended magnet." -Hawkins, 1917... |
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Magnetic field "Experiment showing lines of force in the magnetic field surrounding a conductor carrying an electric current." -Hawkins, 1917... |
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Magnetic field Figure showing magnetic lines of force from a magnet, as well as both north and south poles.... |
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Magnetic field deflection "Oersted's experiements are illustrated...which shows, at A, B, C and D, the four different positions which a balanced magnetic needle tends to assume when placed parallel to a wire through wich an el... |
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Magnetic field, solenoid "Magnetic field of a solenoid. This is best observed by cutting a piece of cardboard and fitting it around the solenoid, as shown." -Hawkins, 1917... |
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