What this topic covers
Production of electric charges by friction, induction and contact. Types of distribution of charges: Simple electroscope to detect and compare charges on differently-shaped bodies. Storage of charges: Application in light conductors. Electric lines of force: Determination, properties and field patterns of charges. Electric force between point charges: Coulomb's law, permittivity of a medium. Concepts of electric field, electric field intensity (potential gradient) and electric potential: Calculation for simple systems. Capacitance: Definition, arrangement and application. Factors affecting the capacitance of a parallel-plate capacitor. The farad (F) as unit of capacitance. Capacitors in series and in parallel. Energy stored in a charged capacitor. Uses of capacitors: e.g. in radio and Television (derivation of formulae not required).
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