Physics

These batteries have 7 year shelf life and are suitable for high drain rate applications (although lithium cells may work better in some applications). They also have better low temperature performance than Zinc cells.

This battery has a 7 year shelf life and are suitable for high drain rate applications (although lithium cells may work better in some applications). It also has better low temperature performance than Zinc cells.

Test the condition of your batteries using this low-cost, versatile and compact battery tester. The tester uses the power of the battery you are testing to power itself, so does not require batteries. • Suitable for checking the state of Zinc chloride, Alkaline and Rechargeable batteries • Will test AAA, AA, C, D, 9V PP3 and batteries

These low cost batteries have 2 year shelf life and are suitable for low drain applications.

These low cost batteries have 2 year shelf life and are suitable for low drain applications.

These low cost batteries have 2 year shelf life and are suitable for low drain applications.

These low cost batteries have 2 year shelf life and are suitable for low drain applications.

These low cost batteries have 2 year shelf life and are suitable for low drain applications.

Packs of 5.

For watches, calculators etc.

For watches, calculators etc.

For watches, calculators etc.

For watches, calculators etc.

For watches, calculators etc.

For watches, calculators etc.

These low cost batteries have 2 year shelf life and are suitable for low drain applications.

Holds 4 x D (R20) batteries with outputs at 1.5, 3, 4.5 and 6 V. Batteries and leads not supplied. Each output has 4 mm socket.

Battery Holder, AA Size.

Battery holder, 2 x AA batteries, with leads.

Battery Holder D Size. Pack of 5.

PP3 snaps with leads. Pack of 10.

The SDS5032E is a general purpose 2 channel digital oscilloscope with large 200 mm colour display, making it ideal for education and industrial environments. Complete with USB output to PC. Specifications and Features: • Bandwidth: 30 MHz • Sample Rate (real time): 250 MSa/s (125 MSa/s per channel) • Memory depth: 10 KB • Maths functions: Add, subtract, multiply, division and FFT • 20 automatic measurements • Auto-scale function • Standard interface: USB, USB flash drive, LAN, VGA • Bandwidth: 30 MHz • Waveform storage: 15 waveforms • Vertical Sensitivity: 5 mV/div~10 V/div (at input) • Vertical resolution: 8 bit • Trigger Type: Edge, Pulse, Video, Slope • Trigger Mode: Auto, Normal, Single

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.

This demonstration motor comes ready assembled, with an open construction which clearly shows the design working parts of a simple motor. The motor is mounted on a robust wooden base with acrylic end plates with 4mm sockets and comes complete with ceramic magnets and yoke. Requires 1 -3 Volt DC laboratory power supply (not included). Overall Dimensions (L x W x H): 125 x 75 x 60 mm.

This self assembly motor kit is very robust and clearly demonstrates the constituent parts of DC motor.

Spare magnet for EL81440 Motor Kit.

A model of the simplest form of DC electric motor, having 2-pole armature wound with enamelled copper wire, and permanent magnetic field provided by removable bar magnet. The construction of the model is completely open and all components are readily observable. A disc-type commutator is incorporated and external connection to the phosphorous bronze bushes is by means of a pair of 4 mm sockets. The motor operates on 6-8 V DC.

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.

These expanded polystyrene balls are used for demonstration experiments with electrical charge. 12 mm diameter.

12 mm x 300 mm.

12 mm x 300 mm.

Nylon friction rods.

This extra-large electroscope is ideal for classroom demonstrations of electrostatic principles such as conduction, induction and coulomb repulsion. light-weight metal vane is used as pointer in the electroscope. The lightweight metal blade deflects when the electroscope plate is charged. transparent scale is provided to measure the angle of the deflection. The front glass window slides up to allow insertion of ionizing material in chamber. This electroscope comes with two accessories: an electrophorus disc and spherical electrode. Dimensions: 248 x 203 x 121 mm.

This pack of electrostatic strips allows students to study charge in different materials for electrostatic experiments. The pack consists of 10 clear polycarbonate strips, which tend to gain positive charge when rubbed with cotton duster and 10 white polystyrene strips, which tend to gain negative charge when rubbed. Suitable for use with our brass wire stirrups.

Pack of 10 brass wire stirrups for use with electrostatic strips.

For charge detection and measurement. Useful for a wide range of experimental applications including charging by induction, Faraday's ice pails, Coulomb's law and capacitance of an isolated sphere. The 3.5 digit liquid crystal display has 13 mm high digits with wide field of view unobscured by trailing leads. The display also provides indication of polarity and low battery. The unit is exceptionally easy to read. Two colour coded 4 mm sockets are located on the sides for maximum convenience and anti-slip feet are fitted to the base. Low operating current gives expected battery life in excess of 500 hours. Housed in a robust, ABS plastic case. Supplied with charge plate, battery and instructions. • Range:0 to 1999 nC • Resolution: 1 nC • Overload: 10 x full scale • Accuracy: ±10% of full scale • Input Resistance: 100 GΩ • Leakage Current: 1pA (10pA max) • Capacitance: 4.7mF

A silk cloth ideal for electrostatic investigations. Dimensions (L x W): 300 x 300 mm.

This Parallel Plate Capacitor demonstrates the working of capacitor; a device which allows the storage of electrical energy in the electric field created between a pair of conductors on which electric charges of equal magnitude, but opposite polarity, have been placed. The apparatus will show the dependence on capacity to the distance between the plates and the nature of the medium between them. Dielectric materials can be placed between the plates for further investigation.

This apparatus allows visualisation of electric fields between various electrode configurations, in a similar way to how iron filings allow visualisation of magnetic fields. It is constructed from transparent acrylic, which allows it to be placed on an overhead projector for class demonstrations but can also be used on white surface for use with visualisers or for direct observation by smaller groups. In order to create electric fields large enough to influence the particles, a high voltage, low current 2-5kV EHT power supply is required. Apparatus includes electrodes, clear acrylic base with 4 mm sockets to clamp electrodes and connect power supply, petri dishes and instructions. Also requires liquid paraffin (PA4452 or PA4454 and semolina (not supplied). Base dimensions (L x W x H): 150 x 150x 65 mm.

A hand driven Van de Graaff generator, which is a very effective unit for introducing electrostatics. The length of the sparks generated is wholly dependent upon the speed at which the user turns the handle but sparks of around 20-30 mm are comfortably achievable. Dimensions (H Dome x Dia.): 400 x 200 mm.

Spare main charge belt for hand driven Van De Graaff, EL101544

Spare hand drive belt for hand driven Van De Graaff, EL101544

A top quality Van de Graaff featuring a motor or hand drive split dome to show how charge is collected in the dome. The generator uses one nylon and one Teflon roller to create double charging effect and sparks up to 10 cm. The 22 cm conductor sphere features a 4 mm socket on the top to accept accessories with a 4 mm plug. For 220/240 V. Dimensions (H x W x D): 560 x 220 x 220 mm. Please note that Discharge Sphere is supplied separately.

Spare charge belt for premium Van De Graaff, EL62550.

Spare drive belt for premium Van De Graaff, EL62550. Dimensions for O-rings: 2.62 x 71.12 mm. 3.0 x 82.00 mm.