Resistors

Explain that resistance can remain constant or change as current changes for different components.
Describe the linear relationship between current and potential difference for an ohmic conductor at constant temperature.
Describe how the resistance of components such as lamps, diodes, thermistors, and LDRs changes with current, temperature, or light intensity.
Explain the application of thermistors (e.g. thermostats) and LDRs (e.g. switching lights).
Explain the design and use of circuits to measure resistance.
Use graphs to explore linear and non-linear circuit elements.
Investigate the I-V characteristics of circuit elements including a filament lamp, a diode, and a resistor.

What you need to know