CLARITY | CONFIDENCE | CURIOSITY
Electricity
Understand current, potential difference, resistance and electrical circuits, from simple components to the National Grid.
Lessons
Explore the lessons below to build your knowledge and confidence across this topic. Each lesson breaks the physics down into clear, manageable steps, with explanations, practice and exam-focused activities to help you understand the key ideas and apply them successfully.
Basic Electrical Circuits
01
Explore circuit symbols and meter connections and complete conducting paths.
Electrical Charge and Current
02
Explore current as charge flow per second and charge, current or time.
Potential Difference
03
Explore potential difference as energy per charge and energy or potential difference.
Resistance
04
Explore resistance and its units and resistance from current and potential difference.
Ohm’s Law
05
Explore the conditions for Ohm’s law and an ohmic i–v graph.
Resistance of a Wire Required Practical
06
Explore variables in a wire-resistance investigation and a controlled wire-length method.
I–V Characteristics
07
Explore ohmic, lamp and diode characteristics and their i–v curves.
I–V Characteristics Required Practical
08
Explore measurements for an I–V graph and a method including reverse polarity.
Series Circuits
09
Explore series current and potential-difference rules and total series resistance and current.
Parallel Circuits
10
Explore parallel current and potential-difference rules and branch and total currents.
Control Circuits
11
Explore thermistor and LDR responses and sensor-driven current changes.
Direct and Alternating Current
12
Learn about direct and alternating current, practise the key ideas and apply them to GCSE Physics questions.
Mains Electricity
13
Explore UK mains supply and wire colours and earth-wire and fuse functions.
The National Grid
14
Explore Grid components and transformer roles and high-p.d. transmission.
Electrical Power
15
Explore electrical power and its units and power using vi or i²r.
Electrical Energy
16
Explore electrical energy relationships and energy using pt or qv.