TOPIC 9 · AS LEVEL

Follow the charge.
Account for the energy.

Connect microscopic carrier motion to current, voltage, resistance, power and the measured behaviour of real components.

THE LEARNING PATH

From elementary charge to practical electrical power

Eight lessons connect particle models, definitions, graphs, conductor properties and energy calculations.

9.18 LESSONS · ACCURATE DIAGRAMS · WORKED PROBLEMS

Connect microscopic charge flow to current, potential difference, resistance, resistivity and electrical energy transfer.

Calculate charge flow, drift speed, wire resistance and electrical power.

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