Figure 2 Power to the load (load voltage*load current) versus cell and load current. For some specific source resistance value, we can plot a horizontal line on our graph (Figure 3 ... but has instead ...

A voltage-current graph for a thermistor is shown below. Voltage - Current graph for a thermistor as current and temperature rise.

A direct current flows in only one direction. On a voltage-time graph this would appear as a straight horizontal line at a constant voltage. Car batteries, dry cells and solar cells all provide a ...