PASCO Coulomb’s Law Apparatus

Purpose: With the ES-9070 Coulomb’s Law Apparatus, students can accurately measure charge, force and distance between two conductive spheres. Its symmetrical design minimizes stray and mirror charges and built-in magnetic damping ensures quick, accurate measurements. Key Features: - Built-in Balance Scale: A degree scale on the torsion balance provides accurate measurements of the torsion wire’s twist angle - Magnetic Damping: Allows measurements to be made quickly, minimizing the traditional difficulties with leakage currents - Milligram Masses: Included so determining the torsion constant and verifying its linearity can be part of the experiment - Insulated Track: The calibrated track is designed plastic to minimize mirror charges which can significantly affect results - Built-in Track Scale: A millimeter scale on the linear track provides accurate measurements of the distance between the spheres - Vary Charge Accurately: A third conductive sphere, identical to the experimental spheres, is included for reducing the charge on one or both spheres by fixed ratios - This method is quick and accurate - Symmetric Construction: All conductive parts are symmetrical, so errors due to mirror charges are practically nonexistent What's Included: 1× Coulomb's Law Apparatus 1× Third Conductive Sphere 1× Charging Probe 1× Allen Wrench and Calibration Masses 1× Calibration Post 1× Manual