Physics

Colour-coded spring balances, in clear bodies with visible spring mechanisms. Calibrated in both newtons and grams.

Colour-coded spring balances, in clear bodies with visible spring mechanisms. Calibrated in both newtons and grams.

Colour-coded spring balances, in clear bodies with visible spring mechanisms. Calibrated in both newtons and grams.

Colour-coded spring balances, in clear bodies with visible spring mechanisms. Calibrated in both newtons and grams.

Colour-coded spring balances, in clear bodies with visible spring mechanisms. Calibrated in both newtons and grams.

Colour-coded spring balances, in clear bodies with visible spring mechanisms. Calibrated in both newtons and grams.

Colour-coded spring balances, in clear bodies with visible spring mechanisms. Calibrated in both newtons and grams.

Closely wound steel springs with loops at each end. Spring constant approx. 0.2 N/m.

For demonstrating Hooke's Law. 20 x 16 mm, approximately 30 N/m.

Flat section steel wire in helical coil. Diameter 75 mm.

Flat section steel wire in helical coil. Diameter 75 mm.

Extension springs with known spring constant.

Extension springs with known spring constant.

A set of five springs of the same length but with different spring constants. Each have an eye at one end and hook at the other. Spring constants are: 2.5, 6.0, 10, 15, and 26 N/m.

Comprising FO140110 Student Timer, and two TI170200 Photogates. Ideal for setups with air tracks, dynamics tracks, or other timing experiments which require light gates. Leads not included.

A double photogate with built-in timer and display, which is capable of precise speed measurements, in addition to all the usual tasks of single photogate. • Incorporates timer with display no separate timer required • Easy to operate • Double light barrier direct readout of speed • Laser optics give high precision measurements • Expandable with external sensors (e.g. microphones) • Use two SpeedGates for all the traditional collision experiments • Several SpeedGates can be daisy chained • Pendulum period mode prevents off-by-one errors • Auto rotating display Speedgate can be used as stand-alone unit or pair can be used to carry out all the experiments you can do with two traditional photogates and universal timer plus much more: with the precisely spaced double laser system you get speed readings without length measurements or calculations. The traditional passage time measurements are still possible, if preferred, for teaching purposes. The display divides into two parts giving you immediate access to all results. An adjacent status area shows when light rays are blocked, the state of external inputs etc. SpeedGate is battery powered so can be used as stand-alone unit no cables are required. However, the apparatus can also be powered via USB cable if preferred. It is operated using three pushbuttons, which control primary mode, secondary mode and reset. The reset button also functions as power switch. The primary and secondary modes each correspond to one part of the display. Suggested experiments: • Kinematics of uniformly accelerated motion • 'g' by freefall • Newton's second law • One-dimensional elastic and inelastic collisions • Mathematical pendulum • Speed of sound (requires 2 x SO150400 microphones) Two SpeedGates can be used for collision experiments; the double display will show the two latest measurements. Connect two (or more) SpeedGates together, using the Speedgate Cable, to measure the time interval between the gates e.g. for acceleration experiments. The whole chain is reset with one button press. The timer functions can even be used with external signals e.g. two microphones (SO86270) and SpeedGate makes complete setup for measuring the speed of sound. Easy to work with the display even orients itself automatically when rotated. The Bundle TI180110 comprises two Speedgate units a connecting cable.

Connector cable for the Frederiksen Speedgate TI170100.

A double photogate with built-in timer and display, which is capable of precise speed measurements, in addition to all the usual tasks of single photogate. • Incorporates timer with display no separate timer required • Easy to operate • Double light barrier direct readout of speed • Laser optics give high precision measurements • Expandable with external sensors (e.g. microphones) • Use two SpeedGates for all the traditional collision experiments • Several SpeedGates can be daisy chained • Pendulum period mode prevents off-by-one errors • Auto rotating display Speedgate can be used as stand-alone unit or pair can be used to carry out all the experiments you can do with two traditional photogates and universal timer plus much more: with the precisely spaced double laser system you get speed readings without length measurements or calculations. The traditional passage time measurements are still possible, if preferred, for teaching purposes. The display divides into two parts giving you immediate access to all results. An adjacent status area shows when light rays are blocked, the state of external inputs etc. SpeedGate is battery powered so can be used as stand-alone unit no cables are required. However, the apparatus can also be powered via USB cable if preferred. It is operated using three pushbuttons, which control primary mode, secondary mode and reset. The reset button also functions as power switch. The primary and secondary modes each correspond to one part of the display. Suggested experiments: • Kinematics of uniformly accelerated motion • 'g' by freefall • Newton's second law • One-dimensional elastic and inelastic collisions • Mathematical pendulum • Speed of sound (requires x SO150400 microphones) Two SpeedGates can be used for collision experiments; the double display will show the two latest measurements. Connect two (or more) SpeedGates together, using the Speedgate Cable, to measure the time interval between the gates e.g. for acceleration experiments. The whole chain is reset with one button press. The timer functions can even be used with external signals e.g. two microphones (SO86270) and SpeedGate makes complete setup for measuring the speed of sound. Easy to work with the display even orients itself automatically when rotated. The Bundle TI180110 comprises two Speedgate units a connecting cable.

This Photogate Unit is specially designed to be used together with the Electronic Counter or timer FO140110. It can be used as an optical switch, activated when the light beam is broken and for pendulum period measurements, air track timing, measuring period of rotation etc. The unit is made from impact-resistant plastic with threads for vertical and horizontal mounting using the supplied 10 mm diameter support post. The Photogate Unit is supplied with powerful red transmitter diode, in front of which is a 1 mm slit, and two LEDs on the sides of the unit (red for transmitter, green for receiver), indicating the function. The Photogate Unit can be connected directly to the DIN sockets of the counter and additional photocells can be daisy-chained and connected to the same counter input, for measurement of acceleration etc. Dimensions: 160 x 120 x 28 mm (W x H x D). Gap width: 90 mm.

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.