Flashcards
Edexcel SP10-Electricity and Circuits
Flashcards do conjunto (14)
- 1ConductorsHave free-moving electrons capable of carrying a charge
- 2Main form of conductive materialMetals- Eg Copper and silver
- 3InsulatorsMaterials with fixed (unmoving) electrons that cannot conduct
- 4Why are metals good conductors?The sea of delocalised electrons that hold them together, can flow freely and easily as current
- 5Examples of insulative materialsMany non-metals, such as:
Rubber
Plastic
Wood - 6CurrentThe flow of electrons/electric charge.
Measured in Amperes (Amps)
Unit symbol: A
Equation symbol: I - 7Direction of flow of electronsNegative terminal of cell/battery to positive terminal
- 8Potential difference (Voltage)Work done (energy transferred) between two points per unit charge:
AKA Joules/Coulomb
Unit/equation symbol: V - 9Series CircuitA circuit with only ONE route for current flow.
All components are either ON or OFF at once - 10Current in a series circuitThe same everywhere
- 11Voltage in a series circuitIs SPLIT AMONG COMPONENTS
(Total = sum of all voltages)
- 12Parallel circuitA circuit with MULTIPLE paths for current to flow
- 13Voltage in parallelThe same throughout the circuit
- 14Current in parallelTotal current = sum of individual branch currents
