Designing loops for electromagnet strength experiment

[Alieneater]

Homework Statement

I need to get 2 major loops in my method or hypthesis. My experiment is which of the following factors affects strength of electromagnet the most: number of coils, the
voltage of the power source, the diameter of the core, or the thickness of the wire.

Can you guys give me loops that I can do with each of these factors. I'm in high school.

Homework Equations

None

The Attempt at a Solution

I really don't know. The loops is the only spot I'm stuck on.

 

[rock.freak667]

What do you mean by loops? Flaws?

 

[Alieneater]

I mean a feedback loop. The feedback loop is in the need to go back to the "Asking a Question" stage should the experiment stage not support the answer stage (Hypothesis).

 

[Alieneater]

I believe that the number of coils will affect its strength the most. I haven't had anything go wrong yet so I would llike to know what feedback loops might I try because I need 2.