Current Electricity

Physics (Science Paper 1) · Chapter 11 · 8. Electricity and Magnetism

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Free electrons; good and bad conductors, semiconductors and superconductors; electric charge, its SI unit and quantisation
Electric current as rate of flow of charge; conventional current and electron flow
Potential difference V = W/q and its SI unit; resistance and its SI unit
Simple circuits: cell, key, bulb, resistance wire, rheostat; open and closed circuits; circuit symbols; detecting current with a galvanometer or ammeter
Sources of direct current: cells and accumulators (brief introduction)
Ohm's law and simple numerical problems