A-level Current Electricity
Resistivity, potential dividers and EMF — AQA A-level current electricity (§3.5.1).
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The full AQA A-level current-electricity section: charge and current from first principles, resistivity and how conduction changes with temperature, superconductivity, the circuit laws with energy and power, the potential divider as a sensing circuit, and EMF with internal resistance — including both required practicals.
What's inside
Charge, current and potential differenceThe fundamentals, from first principles up to the I–V characteristics.
4 lessonsResistivity and conductionResistivity, its required practical, temperature effects and superconductivity.
4 lessonsCircuits, energy and powerCombining resistors and cells, conservation laws, and power.
4 lessonsPotential dividers, EMF and internal resistanceThe potential divider as a sensor, and real cells with internal resistance.
5 lessons