The Water Model

Brilliant! That was the right answer. The water wheel spins faster if the strength of the water flow is stronger!

In an electric circuit with a battery and a transducer, e.g. a light bulb, it is quite similar. The more charge carrier move through the coiled filament of the light bulb in a specific period of time, the higher is the amperage. The higher the amperage, the brighter shines the light bulb.
Therefore, a higher amperage results in a higher power of the light bulb.

With the help of the water model, you have now found out about the effects of amperage and voltage on the power of a light bulb. You are now very close to solving our brain-teaser.