The last experiment was done with the largest easily available light bulb of 230 V/0.5 kW. The same coil as in the previous experiment was used (40 turns), but a larger socket is necessary (equipped with an E40 thread) (figure 4). To light the bulb, we have to use the pot with the water. After taking the pot away, the bulb remains lit up—the consumption of the bulb is recognized as sufficient to be seen as a regular pot on the surface of the plate