Electricity

1 Standard Circuit Diagram Symbols Draw and interpret circuit diagrams using standard symbols. Spec 6.2.1.1 2 Electrical Charge and Current Describe electric current as flow of charge and calculate charge, current and time. Spec 6.2.1.2 3 Current, Resistance and Potential Difference Apply Ohm's Law (V = IR) to calculate current, resistance and potential difference. Spec 6.2.1.3 4 Resistors Describe I–V characteristics of resistors, lamps, diodes, thermistors and LDRs. Spec 6.2.1.4 5 Series and Parallel Circuits Calculate current, potential difference and resistance in series and parallel circuits. Spec 6.2.2 6 Direct and Alternating Potential Difference Distinguish dc and ac, state UK mains values and read oscilloscope traces. Spec 6.2.3.1 7 Mains Electricity Describe three-core cable colour coding, the earth wire, fuses and electrical safety. Spec 6.2.3.2 8 Power Calculate electrical power using P = VI and P = I²R, and select appropriate fuse ratings. Spec 6.2.4.1 9 Energy Transfers in Everyday Appliances Calculate energy transferred using E = Pt, use kWh and describe appliance energy transfers. Spec 6.2.4.2 10 The National Grid Explain how the National Grid transmits electricity efficiently and the role of transformers. Spec 6.2.4.3 11 Static Charge Describe static electricity, explain how charges build up and describe electric fields. Spec 6.2.5 (physics only) 12 Electric Fields Describe electric fields around charges, represent them with field lines, and apply to sparks. Spec 6.2.6 (physics only)