Electrostatics

Gold leaf, pack 6.

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.

For using to discharge the Van de Graaff with sparks up to 10 cm. The polished stainless steel sphere is mounted on stainless steel rod. The base of the rod has 4 mm hole for connection to the earth socket on the Van de Graaff. Sphere diameter: 10 cm. Rod length 41 cm. Please note: retort base not included.

The Generator consists of a dome supported by a pillar and rubber belt driven by an electric motor concealed in the metal base. Static electrical charge is produced by friction between this band and two rollers. The charge is removed from the belt by a metal gauze and stored in the dome. The motor is powered using mains supply (230 V). The base is fitted with a 4 mm diameter socket which can be used either for supporting a conducting sphere (fitted with cranked rod support) or for wire connection to a separate conducting sphere. cover is provided to keep the Van de Graaff free from dust when not in use. • Diameter of Generator Dome: 220 mm • Total Height: 500 mm • Base (max) Dimensions: 218 x 182 x 93 mm • Operating Voltage: 220 to 240 V AC (with 5 A cartridge fuse) • Dome Capacitance: (approx) 15 pF • Maximum (intermittent) current: (approx) µA • Maximum Spark Length: (approx) 50 mm • Diameter of Conducting Spheres: 100 mm Supplied with accessories as shown.

Spare charge belt for Van De Graaff Generator EL85100.

For demonstrating and investigating the nature and behaviour of static electrical charge. Includes; Brush of hair, Dancing balls, Oscillating sphere, Spiked arm wheel, Neon tester, Plastic comb.

This gold leaf electroscope is great for hands on experience with electrostatic principles in physics classrooms and labs. The solidly constructed sheet anodized aluminium walls of the electroscope are mounted on a plastic base. The front glass window slides up to allow insertion of ionizing material in chamber. A transparent scale is attached inside chamber to measure the deflection of the gold leaf. Supplied with two gold leaf sheets. Fitted with 4 mm socket. Dimensions: 165 x 95 x 70 mm. Note: The gold-leaf does not come pre-attached to the electroscope. Instructions on how to properly attach the gold-leaf to the conducting rod are included with the product manual.

The Lascells E-Field Detector provides a new and novel way to demonstrate charge. This highly sensitive electronic device is an essential piece of equipment in the Physics teachers’ armoury as it can detect very small charges and their polarity, as well as charge at a distance. Until now, in the school science lab, it has only been possible to demonstrate opposite and like charges by repulsion and attraction experiments or the very delicate Gold Leaf Electroscope. This unique, robust piece of equipment allows the Physics teacher to clearly show whether a positive or negative charge has been created and in which directions the electrons have moved. The LED array indicates not only positive or negative charge, but also its size. The external voltmeter sockets allow for quantitative measurements. Very quick and easy to setup, the Lascells E-Field Detector is a benefit for specialist and non-specialist teachers alike and is so easy to use that students could gather data themselves. The comprehensive instructions include both traditional experiments that benefit from the use of the Lascells E-field Detector along with new exciting ways to look at charge. This makes difficult concepts more understandable and engaging for the students. This is a real game changer in the subject of electrostatics. 24V AC-DC Adapter included.

The Proof Plane is a device for transferring charge from a charged object. Charge a plastic strip by rubbing with a cloth. Touch the charged object with the proof plane. Charge will be shared between the object and the Proof Plane so both will have the same charge sign. Show this using the E-Field Detector (EL220000) If you are using a Faraday’s Pail touch the inside of the Pail with the charged Proof Plane. Charge will be transferred and immediately move to the outside of the Pail. If the process is repeated equal amounts of charge will be transferred each time. If the Proof Plane is charged by induction the charge sign will be opposite and usually greater than by simple charge sharing. Show these effects using the E-Field Detector.

The Earth Grounding Plate is designed for use with The Lascells E-Field Detector but can also be used in any situation where an earthed working surface is required to neutralise electrostatic charge. Place the Grounding Plate on the bench with the E-Field Detector on top. Using the detector Earth Lead connect the green Earth socket on the detector to the metal screw on the grounding plate. Use a connecting lead to also connect from the green Earth socket to a suitable Earth point such as a metal water pipe or similar.

The Charge Separation Rods are designed for use with the Lascells E-Field Detector (EL220000). Arrange the rods so that they are touching along an axis. Bring a charged object near one end of the rods and use a pencil or similar to slide the rods apart touching only the feet and not the metal part of the rods. When the charged object is removed test the charge on the two separated rods. If the charged object is negative, electrons are repelled to the rod furthest away leaving the rod closest to the object positively charged. By moving the rods apart the electrons cannot return so the furthest has an overall negative charge and the nearest an equivalent positive charge.

Spare drive belt for EL85100.