GCSE Physics
Electricity
Electricity is a core strand in Physics. Work through the topics below in any order, or follow your course — each guide includes explanations, common mistakes and exam-style practice.
Topic guides
Current, Voltage & Resistance
Current, Voltage & Resistance is a Physics topic where definition mix-ups cause most of the damage.
Open guideSeries & Parallel Circuits
Series & Parallel Circuits is easiest when you compare the two setups rule by rule.
Open guideElectrical Charge
Electrical charge is a fundamental property of matter.
Open guidePotential Difference
Potential difference (also known as voltage) is the work done per unit of charge that passes between two points in a circuit.
Open guideOhm's Law
Ohm's Law states that the current through a conductor is directly proportional to the potential difference across it, provided the temperature and other physica
Open guideIV Characteristics
I-V characteristics describe how the current (I) through a component changes as the potential difference (V) across it is varied.
Open guideElectric Power
Electric power is the rate at which an electrical appliance transfers energy.
Open guideDomestic Uses & Safety
Domestic electricity in the UK is an AC (alternating current) supply at approximately 230V and a frequency of 50Hz.
Open guideEnergy Transfers in Circuits
When charge flows through a component with resistance, electrical work is done and energy is transferred.
Open guide
Revision strategy
Students often slip on the details explained in our guides — read the “common mistakes” section in each topic.
- Alternate between reading a guide and doing timed questions — don’t only re-read notes.
- Return to this hub anytime; new guides appear automatically as we publish them.