Science Fair Homopolar Engine Variable

[Sico Music]

Hello,

 

I decided that i would do something involving the homo polar engine for my science fair project. I have been trying to think of a variable i can change for it but all the ones i have come up with just wont work. Some of them are:

•Battery size (wont work it only works on 1.5v batteries as i read somewhere)

•Types of batteries (would be to expensive to test 7 times on each battery)

•Do the 5 speed homo polar engine and record the amount of revolutions it does a minute.

 

I have had others but have forgotten them. Ive ran out of ideas, so Ive turned to the brains of this science forum. Please if someone has a good variable that i can test well, graph and doesn't involve buying A LOT of batteries it would be brilliant if you could tell me.

 

BTW i live in Australia just in case someone was going to mention something that can only be done in America.

[Cap'n Refsmmat]

For a motor as simple as that, I bet it could work on different battery types. But what level/grade science fair is this? You'll want to explore something more than just "more powerful batteries make it run faster!"

 

Perhaps you could hook it up to something...

[Sico Music]

Yeah i should of mentioned that im in Year 9. I can only think of the basic ones i really want a technical one but i just cant think of any.

[swansont]

You could vary the type/strength of magnet, or effects of different metals (same shape & size) placed in between the magnet and the battery (or maybe under the battery) to see if that varies the strength of the field sampled by the wires.

[Sico Music]

I decided that im going to give up on the homo polar engine just because i just cant think of a good variable and im just going to do a levitating block. Its abit basic but i just cant think of anything else.