Thats personally what i thought too..
We were trying to develop a way to connect them all in series to see if that would produce more current than a crank or battery alone.
But personally we think the crank would produce more energy.
As to the steel bars..
We used the smallest one..and...
Well anyways..
I'm currently a student at a High School.
We have these "Scrap heap challenges"
The idea of this one is to build a "Electromagnetic device"
This one is to hold at least 5 grams of weight and maintain it..
After that we keep adding weight to see who's can hold the most
With...