Edexcel SP10-Electricity and Circuits

Question	Answer
Conductors	Have free-moving electrons capable of carrying a charge
Main form of conductive material	Metals- Eg Copper and silver
Insulators	Materials with fixed (unmoving) electrons that cannot conduct
Why are metals good conductors?	The sea of delocalised electrons that hold them together, can flow freely and easily as current
Examples of insulative materials	Many non-metals, such as: Rubber Plastic Wood
Current	The flow of electrons/electric charge. Measured in Amperes (Amps) Unit symbol: A Equation symbol: I
Direction of flow of electrons	Negative terminal of cell/battery to positive terminal
Potential difference (Voltage)	Work done (energy transferred) between two points per unit charge: AKA Joules/Coulomb Unit/equation symbol: V
Series Circuit	A circuit with only ONE route for current flow. All components are either ON or OFF at once Image: Series (binary/octet-stream)
Current in a series circuit	The same everywhere Image: Series Copy (binary/octet-stream)
Voltage in a series circuit	Is SPLIT AMONG COMPONENTS (Total = sum of all voltages) Image: Voltageseries Copy (binary/octet-stream)
Parallel circuit	A circuit with MULTIPLE paths for current to flow Image: Parallel (binary/octet-stream)
Voltage in parallel	The same throughout the circuit Image: Voltageparallel Copy (binary/octet-stream)
Current in parallel	Total current = sum of individual branch currents Image: Parallel Copy (binary/octet-stream)

Resource summary

	Created by Delvin Hayfron almost 8 years ago