Product Overview
This enclosed-form Coulomb’s Law apparatus provides an economical, classroom-ready method for exploring electrostatic repulsion and the inverse-square relationship of electric force. Designed for semi-quantitative measurements, it enables students to observe the repulsion between two like-charged spheres and estimate force by reading corresponding deflection angles.
Inside the draft-shielded acrylic chamber, a lightweight conductively coated Styrofoam sphere is suspended from above. A solid metal test sphere slides smoothly along a grooved guide block on the base for controlled position adjustments. Students measure deflection using the 0°–70° angular scale printed on the front window, while the 10 cm internal linear scale assists in determining sphere separation distance.
Charges are introduced using standard electrostatic materials such as a hard-rubber rod with a fur or wool pad. A third solid metal sphere mounted on an insulating handle is included for adding or redistributing charge within the chamber.
The clear, all-plastic enclosure reduces air-current interference and provides 360° visibility. A built-in grounding point allows users to eliminate unwanted residual charge before each trial, improving the reliability of measurements.
Dimensions (W × D × H): 165 × 90 × 135 mm
Included: Enclosed apparatus, third metal sphere with insulating handle, and instructions.
Ideal for demonstrating essential principles of electrostatics and giving students a hands-on introduction to Coulomb’s Law in a controlled, easy-to-use format.
