Edexcel International GCSE Physics2c Energy and voltage in circuits Checklist

Papers 1 and 2

• I can explain why a series circuit or a parallel circuit is more suitable for particular applications, including domestic lighting.
• I understand how the current in a series circuit depends on the applied voltage and on the number and nature of the other components.
• I can describe how current varies with voltage in wires, resistors, metal filament lamps and diodes, and how to investigate this in an experiment.
• I can describe, qualitatively, how changing the resistance affects the current in a circuit.
• I can describe, qualitatively, how the resistance of light-dependent resistors (LDRs) varies with illumination and how the resistance of thermistors varies with temperature.
• I know that lamps and LEDs can be used to show that a current is present in a circuit.
• I know and can use the relationship between voltage, current and resistance: voltage = current × resistance, V = I × R
• I know that current is the rate of flow of charge.
• I know and can use the relationship between charge, current and time: charge = current × time, Q = I × t
• I know that electric current in solid metallic conductors is a flow of negatively charged electrons.
• I understand why current is conserved at a junction in a circuit.
• I know that two components connected in parallel have the same voltage across them.
• I can calculate the currents, voltages and resistances of two resistive components connected in a series circuit.
• I know that:•voltage is the energy transferred per unit charge passed•the volt is a joule per coulomb
• I know and can use the relationship between energy transferred, charge and voltage: energy transferred = charge × voltage, E = Q × V