Charge, current, voltage and resistance
Charge, current, voltage and resistance
Electric circuits transfer energy because electric charge moves around the circuit. In metal wires the moving charges are electrons, but conventional current is still drawn from the positive terminal to the negative terminal.
Step-by-step lessons on Edexcel IGCSE Physics Energy and voltage in circuits. Each one builds up to exam-style questions. Build a strong foundation in mechanics and electricity before tackling the more mathematically demanding astrophysics and nuclear topics.