Electrical Charge

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 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.

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

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.