Empty lamp
Behind the buttons on the right side you can find tips for the solution. Choose one of them! You can also use several hints successively.
Helpful hints
Duel between lamps
Which light bulb shines brighter?
Which light bulb shines brighter?
Compasses and current
We observe the current.
We observe the current.
The usage of energy
Lilly and Fred think about what is happening with the energy.
Lilly and Fred think about what is happening with the energy.
In the battery
Where does the current from the battery come from, actually?
Where does the current from the battery come from, actually?
This may help you...
In the toolbox you can find important physical basics and useful facts.
In the toolbox you can find important physical basics and useful facts.
"I've got it!"...
...and I would like to answer the question.
...and I would like to answer the question.