http://www.sciencejoywagon.com/physics-shop/topic/magnetism/1.html Magnetism
I keep a lot of these ceramic magnets on hand. They are strong and inexpensive.
High flux density permanent magnets don�t have to be all metal-as these ceramic magnets illustrate. Set includes two magnets each made of iron, nickel and beryllium oxides, fired together with a basic clay mixture. Ground to exact tolerances, they are free of pole orientation and magnetized through their whole thickness. Size: 48 x 22 x 10mm each. Package of two.
Price=$4.75
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Classically styled chrome steel magnets are large, easy to work with and affordably priced. Painted bright red with silver poles. Keepers included.
Price=$7.60
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Non-electric product saves the cost of buying expensive horseshoe and bar magnets every year because they have lost their magnetism. Simply match up opposite poles with the remagnetizer and your magnets will be rejuvenated by two permanent neodyrium magnets. This easy-to-use device mounts easily to a table or wall and has magnetic poles marked North and South. Size: 10cm x 12.5cm x 5cm high.
Price=$69.95
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Pairs of identical magnets are needed in many student labs, such as field mapping or repulsion. These paired magnets are ideal for this work. They are available in two different styles, and each set includes a pair of keepers to preserve the strength of the magnetization. Poles are painted and marked.
Price=$8.94
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Rare earth magnets are always risky to pass around in class because they are so strong they will often break themselves upon impact with another magnet. This particular magnet is safer because it is coated.

Rare-earth magnets are known for their power. This Neodymium magnet can be used for everything from speakers to motors and to demo repulsion/levitation. Size: 3.2 x 1.6 x 0.99cm.
Price=$11.95
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One of those high interest discrepant events that generates interest and excitement.

With this fascinating kit, you can demonstrate both the Meissner Effect and the Suspension Effect. Includes: a neodymium iron boron cube magnet, a superconductive 1.5cm enhanced flux pinning disc and a standard 1.5cm disc made of ytterbium-barium-copper-silver oxide, a samarium cobalt rare earth magnet, tweezers and a teacher’s guide.
Price=$76.50
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They don’t give milk. But they do assist in its production. These magnets are fed to cows in order to attract and hold metal particles the animal may have ingested while grazing. Your students will enjoy watching them float in a hollow steel cylinder and perform other such feats. Size: 7.5cm long with a diameter of 1.2cm.
Price=$7.95
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Useful for Classroom or Lab Experiments. Keep these magnet pairs on hand for experiments involving magnetization and demagnetization. Each magnet has permanently marked poles. Available in two sizes. Set of 2.
Price=$19.78
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This is nice to have to pass around. Even though it is clear, it doesn
Price=$19.70
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I like that this particular field demonstrator shows the field in two planes rather than just one. Being able to use it on an overhead projector is also nice.

Plates with matrices of 98 small circular chambers contain an iron rod, which functions as effectively as a plotting compass. The transparent plates can be arranged in various ways including as faces of a cube or as a single large two-dimensional surface. This versatility allows you to show the configuration of magnetic fields in one or two dimensions. The transparency of plates also allows for overhead demonstrations. Size: 26 x 26 x 1cm.
Price=$21.95
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A compact probe with magnet eliminates the need for plotting compasses and iron filings. Each unit consists of a small bar magnet suspended in a gimbal mounting. When the probe’s magnet is placed in a magnetic field, it rotates to align with the magnetic field lines in all three dimensions. The ends of each probe magnet are painted to distinguish the direction of the field. Use Magnaprobes to explore the fields of permanent magnets and electromagnets. Magnaprobes magnet moves freely on pivot bearings. Its sturdy plastic assembly prevents magnetic interference with the probe. Includes instructions.
Price=$23.00
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I really like this set for demonstrating induction and the basics of a transformer.

Easily conduct activities to illustrate electromagnetism and induction with this set of dissectible coils and cores. Also useful in basic transformer experiments. Included coils are 200, 400, 800, 1600, and 3200.
Price=$250.00
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Get a large class set, useful for mapping out magnetic fields.
This compass features a metal capped needle with the north pole marked, mounted in a 45mm diameter case. The scale is marked in degrees, and the cardinal compass points are marked.
Price=$4.45
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This motor is affordable so you can get several for the class. The magnetic field layout is unusual (different than we typically teach) but the variety of design is good to keep students from only seeing things one way.
Completely assembled, this open design is similar to diagrams in most textbooks and allows easy learning of motor-related principles. Magnets can be reversed to change direction of the motors rotation. To observe change of speed with current, use an external rheostat (not included). Motor can be used vertically or horizontally, for both experiments and demonstrations. Motor is lightweight and can be used with a 1.5V battery or external power supply that you provide. Instructions and storage case included.
Price=$16.38
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I really like the clear view the inner workings of this motor through the completely clear construction. This model of a simple DC electric motor features three armatures - 2 pole, 3 pole, and 4 pole (this is a real plus to get students to see variety in design)- all wound with enameled copper wire. A permanent magnetic field is produced by a removable bar magnet. A disc-type commutator is incorporated and external connection to the phosphor-bronze brushes is by means of a pair of 4 mm sockets. Operates on 4.5-9 VDC.
Price=$48.60
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The manual, Adventures with the Genecon, lists 24 different experiments, each with key concepts and teaching tips.
Price=$16.89
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These kits if purchased in quantity are cheap enough that every student can and should build one. They are a bit tempermental but are a great demonstrating electromagnetism with the added benefit of helping students work on their patience and direction reading.
Price=$179.95
Buy]]> Fri, 23 Oct 2009 12:13:03 -0400 http://www.sciencejoywagon.com/physics-shop/p/magnetism/180/electric.htm http://www.sciencejoywagon.com/physics-shop/p/magnetism/180/electric.htm
Simply add current via the Genecon to visually demonstrate the relationship between electricity and magnetism. With this electromagnet, your students can more easily visualize the relationship between electricity and magnetism. The large coils are perfect for applying the Right Hand Rule, so students can discover the direction of the magnetic field they cause. The horseshoe-shaped soft iron responds to the field by becoming magnetized only when you supply current. You can connect it to a battery, a transformer, or use the Genecon and have your students measure the amount of force they can create.
Price=$19.00
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I found a pair of these very useful for demonstrating motor/generator relationship, including work and energy loss. Ideal as a battery replacement for a wide variety of basic electricity experiments, the Genecon generator is a low voltage power source that lets you create electrical current by simply turning a crank. This ingenious device generates student interest as well as 5 volts of direct current - producing electrical energy through hands-on student effort. Students enthusiasm is immediate, whether they are third graders lighting a bulb or college students reviewing sophisticated principles such as Ohm's Law or the electromagnetic properties of various materials. Made from a sturdy, see-through ABS resin with nylon-plastic gears and handle, the Genecon is designed to shrug off use and abuse. It produces approximately 200mA of usable current. You can reverse polarity by simply cranking the handle in the opposite direction. And, when powered by another Genecon or low voltage power source, it acts as a motor. Conduct dozens of exciting, hands-on experiments with the Genecon and its accessories:
Price=$19.95
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