The iron powder can be freely moved in the oil box. Consists of oil iron powder sealing machine of glass box, smooth surface without scratches and dimensions for 200 * 123 * 11mm, the iron is arranged freely in the beating by tapping the box in the experiment.
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Fixed on the base of stable and transparent strip on the needle of the compass, can use the projector, with 2 security posts, the copper rod length should be similar with the length of the base, can the current through the 3A.
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Magnetic Induction Line Demonstrator
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It can vividly demonstrate the formation of the magnetic field direction, magnetic induction line direction and magnetic induction line around the magnetic field. This instrument consists of the permanent magnet and the magnetic field lines. This instrument is mainly used to teach the physical magnetic field in the middle schhool.
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Three-Dimensional Magnetic Induction Line
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It is used to observe magnetic induction lines distribution shape and direction of permanent magnet in physics teaching.
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