The diagram shows a simple circuit: the cell provides energy, V volts, which causes a current, I amps, to flow around the circuit. There is also a resistance, R ohms.
This circuit provides a simple model for what happens in an electric kettle: a resistance converts electrical energy into heat energy by impeding the flow of electrons around the circuit.
The table shows data collected from a circuit like this.
|Resistance (ohms)||Temperature (degrees Celsius)|
Once you have found the equation, discuss these questions: