The Electroscope Subscribe to unlock Gain access to Animated Cartoons, Summary Posters and Problems Solved in front of you throughout the school year, until the end of your exam, from as little as $5.50 per week! Join now or Log in Electricity and Magnetism Historical Development of Electrostatics Types of Charge Conservation of Charge Insulators and Conductors Charging an Object The Electroscope The Van de Graaff Coulomb’s Law Using Proportionality Superposition Gravitational Forces vs Electrostatic Forces Electric Fields Mathematical Description of Electric Fields Mapping Electric Fields Pictorial Representation of Electric Fields Locating the Point of Zero Electric Field Corona Discharge Photocopiers