TOPIC 10 · AS LEVEL

Track every branch.
Balance every loop.

Use charge and energy conservation to analyse networks, real sources, potential dividers, sensors and null measurements.

THE LEARNING PATH

From reading connections to precision null methods

Eight lessons build circuit reasoning from topology and conservation laws to sensor design.

10.18 LESSONS · ACCURATE DIAGRAMS · WORKED PROBLEMS

Analyse complete direct-current networks using conservation laws, equivalent resistance, source models and potential-divider methods.

Calculate equivalent resistance, real-cell output, dividers and potentiometer balance.

Eight CIE-style problems with staged hints and full solutions.