Product Overview
Please note, this item is Assemble-to-order and will take up to 2-3 weeks to ship after placing your order.
This enclosed case form of a Coulomb’s law apparatus is economical and may be used for semi-quantitative experiments that demonstrate Coulomb’s law. Specifically, this apparatus may be used for investigating the repulsion between two similarly charged spheres and provides the ability to measure the deflection angle and thus the force between them.
A conductively coated light Styrofoam sphere is suspended within a draft-free acrylic chamber; base supports the chamber and is grooved to a guide block on which the solid metal test sphere moves. The charge can be provided by rubbing hard rubber rod on a fur pad or wool cloth. Deflections are observed against a 0°-70° scale printed on the front window. A linear scale 10 cm long mounted inside is used in determining the position of the charged spheres. Third sphere of solid metal on an insulating handle is provided for modifying the quantity of charge on two spheres inside the acrylic chamber.
The all-plastic construction prevents air flow from interfering with the deflection of the suspended charged sphere, but the transparent design allows observation from all directions. Grounding eliminates deflections caused by charges residing in the chamber.
The assembled apparatus measures (w × d × h): 165 × 90 × 135 mm. With instructions.
