Magnetism

This kit consists of two tubes (one copper, one plastic) and two discs (a supermagnet and an aluminium disc of similar size). When the supermagnet is dropped down the copper tube, it falls much more slowly than might be expected. The other tube/disc combinations do not show this effect, since eddy currents are only produced using the copper tube and the supermagnet. Tube Dimensions (L): 250mm.

Designed for student experiments in electromagnetism, this U-Shaped Electromagnet encourages students to discover and learn the relationship between electricity and magnetism. Requires standard laboratory power supply, maximum voltage 12 V DC. Weight: 0.3 kg. Dimensions (W x L xD): 100 x 150 x 50 mm.

This apparatus is used to study the effect of number of coils on the strength of an electromagnet. The effect of current on strength of the electromagnet can also be studied. The electromagnet coil has 4 mm sockets and tappings at 100, 200, 300, 400, 500 and 600 turns. A hook on the underside allows paper clips to be attached to indicate the strength of the electromagnet for each variable. A low voltage laboratory power supply is also required.

The Relay Demonstration Unit allows the investigation and study of how a relay functions, in a clear and practical manner. A useful property of this unit is that the circuit powering the coil is easily seen to be completely separate from the circuit switched on by the relay. This is one of the reasons relays are used where safe low voltage circuit can be used to control high voltage circuit. When current flows through the coil an electro-magnetic field is produced. This field attracts the iron armature whose end makes the contact, completing the circuit and illuminating the lamp. When the current is switched off, the contact will open again, switching the circuit off. Specifications: • Control input voltage: 2 V DC • Switched supply voltage: 12 V Max

All the components of an electric bell are mounted on a large panel. All wiring is visible and parts are large in size. Operates on 3-4 volts DC

To demonstrate the relationship between magnetism and electricity. Soft iron U-shaped core and keeper with hook. Dimensions (H x Dia.): 110 x 9 mm.

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.

The globe is suspended from an electromagnet. This makes the friction very low and the earth will rotate at constant speed for many hours after being spun around. AC adapter included. Dimensions (Dia.): 200mm.

A version of traditional piece of equipment for demonstrating the effect of current flowing through conductor in the presence of magnetic field. Connection is made via the 4 mm sockets attached to the side rails. When current of up to 8 A flows, the crossbar rolls one way or the other under the action of the electro-magnetic force. With clearly labelled poles to the magnet it is easy to demonstrate Fleming's Left Hand Rule.

This current balance apparatus (BIL coil) consists of a printed circuit board coil mounted on a support handle. The board has 2 coils one with 5 turns and one with 10 turns, rated at 2 A. The apparatus can be used to measure the force on current carrying conductor in magnetic field. permanent magnet should be placed on the pan of digital balance (a yoke with 2 ceramic magnets will work) and the BIL coil mounted in vertical plane between the magnets. When connected to low voltage power supply and ammeter, the balance will be deflected and the new reading can be taken. The force on current carrying conductor and field strength can then be calculated.

For demonstration of the force on current carrying wire in magnetic field. 270 x 100 x 160mm (H x W x D)

A comprehensive kit for teaching up to 8 students the various aspects of electromagnetism. Containing: Alloy magnets, ceramic magnets, steel magnets, yokes, plotting compasses, hardboard formers, iron filings, double C-cores, clips, rings and split rings, support bases, armatures, axle rods, split pins, rivets, rubber tubing, formers, reels, cellulose tape, copper wire, pasteboard, postcards, cotton, resistors, bulbs, lampholders, clamps, blocks and full instructions.

Kit of parts to build six model motors as in the 'Westminster' electromagnet kit. The Motor Construction Kit enables pupils to build their own motors from scratch. By having to construct motors in this way pupils gain better understanding of the theory behind electric motors. Contents: • 12 'Magnadur' magnets • 6 armatures • 6 mild steel yokes • 6 support bases • 6 shafts • 24 rivets • 12 split pins • 1 reel 0.6 mm PVC tinned copper wire • 2 reels Sellotape • 300 mm tubing, 2.5 mm bore

Shafts (axels) for Westminster Electromagnetic Kit MA91525.

Rivets for Westminster Electromagnetic Kit MA91525.

Split pins for Westminster Electromagnetic Kit MA91525.

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 very popular and compact Westminster power supply that is ideal for school use in Key stage 4 and 5 physics lessons with its tough steel case protected by a tough powder coated finish that will last years of use. The unit will deliver up to 16 A AC or DC through its colour coded terminal posts. This power supply is very popular for use in electromagnet experiments. •AC & DC Output: Voltages 1-2 V •Current 16 A •Voltage type - Fixed •Output type - Full wave rectified DC & AC •Mains input 230/240 V AC, 50 Hz •Supplied with mains plug and lead •Manufactured in the UK

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

Ceramic magnets. Dimensions: 50 x 19 x 6 mm. Suitable for the Westminster Electromagnetic Kit. Sold in packs of 10.

Ceramic.

In pairs with keepers. 50 x 16 x 10 mm (L x W x D)

In pairs with keepers. 75 x 16 x 10 mm (L x W x D)

A set of 20 painted (red/blue) ferrite magnets for general use in exploring magnetism. Colour coded for easy identification and supplied in a snap top case. Magnet size 14 x 10 x 50 mm.

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

The gauss gun (also known as gaussian gun or rifle) is an example of magnetic linear accelerator and uses powerful neodymium magnets to launch steel sphere at high speed. Magnets are held in place part way along the tube (using the steel washers provided), with two steel spheres on the 'downhill' side. Another sphere is rolled slowly towards the magnets and as it gets closer the magnetic attraction causes the sphere to accelerate considerably, resulting in the sphere impacting with the magnets, transferring energy to the sphere at the opposite end of the magnets causing it to shoot off at high speed (similar to how Newton's cradle works). Even faster speeds can be achieved by using series of magnets and spheres. The magnets and steel spheres are contained within clear plastic tube for safety reasons (neodymium magnets are brittle and can splinter, the spheres can be accelerated with some force). Kit includes magnets and steel spheres, washers, a clear plastic tube, a stand for the tube and a brass peg. Instructions for use are also included.

Alnico horseshoe magnet painted red, with keeper. Size 25 mm.

One of the most powerful permanent magnets ever produced. Distance between poles 27 mm. Dimensions (L x H x W): 110 x 103 x 50 mm.

Feel the ultimate pulling power of magnetism with this pair of incredible new Super Magnets. Housed in tough colour coded outer mouldings (red - North, blue - South) the design allows children to safely experience first hand the force of neodymium - currently the world’s strongest permanent magnet! Size 60 mm.

Powerful disc magnets with the poles on the flat surfaces. Please Note: These magnets are brittle and fragments can fly off if magnets are allowed to come together rapidly, potentially causing harm or eye damage. Careful handling is also required to prevent skin from becoming trapped between two magnets. 8 mm depth x 10 mm diameter.

Powerful disc magnets with the poles on the flat surfaces. Please Note: These magnets are brittle and fragments can fly off if magnets are allowed to come together rapidly, potentially causing harm or eye damage. Careful handling is also required to prevent skin from becoming trapped between two magnets. 8 mm depth x 10 mm diameter.

Powerful disc magnets with the poles on the flat surfaces. Please Note: These magnets are brittle and fragments can fly off if magnets are allowed to come together rapidly, potentially causing harm or eye damage. Careful handling is also required to prevent skin from becoming trapped between two magnets. 4 mm depth x 10 mm diameter.

Spare C Core and clip for Westminster Electromagnetic Kit MA91525.

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