Edexcel International GCSE Physics2b Mains electricity Checklist

Papers 1 and 2

• I understand how insulation, double insulation, earthing, fuses and circuit breakers protect the device or the user in a range of domestic appliances.
• I understand why a current in a resistor leads to the electrical transfer of energy and a rise in temperature, and how this can be used in a variety of domestic contexts.
• I know and can use the relationship between power, current and voltage: power = current × voltage, P = I × V, and I can apply it to choosing suitable fuses.
• I can use the relationship between energy transferred, current, voltage and time: energy transferred = current × voltage × time, E = I × V × t
• I know the difference between mains electricity, which is alternating current (a.c.), and the direct current (d.c.) supplied by a cell or battery.