Magnetic Fields

Useful for cores of electromagnets as soft iron loses its magnetism when the current in the coil is switched off, whereas steel retains some magnetism after the current is switched off. Dimensions (L x Dia.): 200 x 12 mm.

For magnetising and demagnetising ordinary magnets, iron bars etc. Consisting of 250 mm long solenoid wound with insulated copper wire mounted on base with switch and 4 mm terminals. Operating voltage 12 V AC or DC at 6 A. Magnetising by AC or DC. Demagnetising by AC.

With two clear glass faces.

This apparatus offers a clear and easy way to observe magnetic fields generated by a constant electrical current. Iron filings can be scattered on the clear surface which passes through the coil and when a current then flows around the coil, the magnetic lines of force will be shown by the alignment of the filings. The apparatus can also be used in conjunction with a magnetic field sensor and/or datalogger. Requires high current laboratory power supply (8-10 A) for best effect. Weight: 1.2 kg. Dimensions (L x W x H): 300 x 200 x 250 mm.

Solenoid - Clear base unit for bench or OHP use, to demonstrate electromagnetic fields around conductors. Available as three different models. Each mounted on base measuring L150 x W150 x H45 mm.

Vertical wire - Clear base unit for bench or OHP use, to demonstrate electromagnetic fields around conductors. Available as three different models. Each mounted on base measuring L150 x W150 x H45 mm.

Twin coils - Clear base unit for bench or OHP use, to demonstrate electromagnetic fields around conductors. Available as three different models. Each mounted on base measuring L150 x W150 x H45 mm.

A double wall tube with iron filings encased between the two layers to show 3-dimensional view of the magnetic field around the magnet. Dimensions 130 x 90mm (L x dia.).

A white frame with transparent window containing magnetic powder in a water based solution for showing magnetic field patterns. When a magnet is present the particles of iron inside become slightly magnetised, so they attract each other and cluster into the lines that show the magnetic field patterns. Includes a pair of small ferrite block magnets and a pair of plastic cased bar magnets and teachers leaflet. Size 225 x 130 x 15 mm.

A free moving magnet mounted in gimble to show the true shape of magnetic fields far better than iron filings or plotting compasses.

Iron filings in a plastic shaker, ideal for magnetic flux experiments. Size 80 mm, approx. 225 g of Iron filings.

This amazing flexible sheet 'visualizes' the direction of magnetic field lines. The sheet is coated with translucent microspheres (hollow capsules) containing very small magnetic nickel flakes suspended in an oil. The flakes inside the spheres align along the field lines when magnetic field is present. The alignment of the flakes, and thereby the magnetic field direction, is visible because of reflected light from the flakes. Useful for quality control, product demonstration, reverse engineering, and educational purposes. 300 x 300 mm, non-laminated film which is great for demonstration purposes as it can be cut to any size or shape as required, is highly flexible and can easily be wrapped around objects. good example is to wrap it around copper tube to 'view' the progress of neodymium magnet as it slowly descends through the tube. The film is also useful for viewing complex magnetic pole geometry close to the magnetic poles, although it does require fairly strong magnetic fields.

This amazing flexible sheet 'visualizes' the direction of magnetic field lines. The sheet is coated with translucent microspheres (hollow capsules) containing very small magnetic nickel flakes suspended in an oil. The flakes inside the spheres align along the field lines when magnetic field is present. The alignment of the flakes, and thereby the magnetic field direction, is visible because of reflected light from the flakes. Useful for quality control, product demonstration, reverse engineering, and educational purposes. 95 x 95 mm laminated film which is ideal for student use as it is more durable and less easy to damage. The film is also useful for viewing complex magnetic pole geometry close to the magnetic poles, although it does require fairly strong magnetic fields.

A versatile and impressive tool for displaying field patterns on an OHP and simulating the magnetising of bar. When four plates are stacked together, they model metal bar that can be magnetised by stroking with bar magnet and demagnetised by shaking. 98 magnetic pins in each plate.

For demonstration of two and three dimensional magnetic field lines. The kit includes magnetic field box, magnetic field plate and three magnets (2 bar magnets and a horse shoe shaped magnet). The magnetic field box as well as the plate contains iron file flakes suspended in viscous liquid. In the middle of the box is placed a magnet forcing the iron file flakes to turn to display the field lines. Likewise it is possible to place a magnet on the plate to visualize the field lines. Box Dimensions: 76 x 76 x 76 mm. Plate Dimensions (W xL x D): 91 x 157 x 9 mm.

A pair of preformed coils, each with 400 turns of copper wire, wound onto former of approx. 150 mm diameter. Each coil is mounted on a support rod, which fits onto the sliders of the track system supplied. This enables the distance between the coils to be varied whilst maintaining alignment along common axis, for measurements and study of magnetic fields. Electrical connection is via 4 mm sockets. Please note: the current should not exceed 1 A, to prevent overheating or damage. Direction of current is marked on each coil. • 150 mm diameter • 400 turns • Max. current 1A

Comprises a 3300 turn coil mounted on a wand, with flying leads terminating in 4 mm plugs. An alternating magnetic field passing axially through the coil will induce an e.m.f., which can be observed on an oscilloscope or AC millivoltmeter. Designed and manufactured in the UK.

Comprising a 10 turn coil of diameter approximately 15 cm, mounted on base with 4 mm connecting sockets. When AC is passed through the coil, an alternating magnetic field is induced, which can be detected with search coil. Requires power supply which can deliver high current at low voltage, such as Westminster Power Supply MA18796. The current must not be allowed to exceed 6 A. Designed by Timstar for AQA A-level physics required activity number 11.

Using high temperature superconductor (HTSC), this kit demonstrates an intriguing magnetic property of superconductors, known as the Meissner effect. The kit demonstrates the levitation of small rare earth magnet above the high temperature superconductor, caused by the partial expulsion of the magnetic flux from the HTSC sample. Liquid nitrogen (not supplied) is required as a coolant, to bring the superconductor below its critical temperature. When the superconductor is cooled, under a weak magnetic field, to a temperature below its critical temperature, it becomes superconducting i.e. loses its electrical resistance. The magnetic field becomes expelled from the superconductor, causing it to become perfectly diamagnetic. At this stage, the sample is said to be in the Meissner state. Please note: liquid nitrogen is required, but not supplied Kit Includes: • Insulated Styrofoam holder • Superconducting HTSC disk • NdFeB rare earth magnet • Tweezers • Instructions, including advice for handling liquid nitrogen

Tough plastic cased compass with lanyard. Marked with 4 compass points and full 360 degree scale around its edge. Size 45 mm diameter.

Measure the magnetic field of permanent magnets, coils or simply the earth's magnetic field. Thanks to the 3 measuring axes, the magnitude and direction of the magnetic field can be determined at any point in space. •Quick and easy connection via Bluetooth and the free measureAPP •Contains a USB-C rechargeable lithium polymer battery •Up to 50 hours use on one battery charge •Range: ±130 mT; ±5 mT •Resolution: 0.1 mT; 0.001 mT •Sample rate: 1000 Hz