Since electromagnetism and electricity are the same force, why haven't we ever seen Storm bend metal via ferromagnetism manipulation? I've always been curious by this and why hasn't she performed this ability.
We know Storm can control charge particles with her mind and psionically (mind control) direct where she wants the current to go. And so, the mechanics behind ferromagnetism manipulation wouldn't necessarily be outside of Storm's power set or difficult for her to pull off.
In physics, ferromagnetic materials can be moved or 'manipulated' if you will - if there is an electromagnetic field near it. Because ferromagnetic materials have a subatomic particle occurring in the nuclei called proton. The electrons from the electromagnetic field are attracted to the protons, thus creating a magnetic connection between the two. Now Storm can create an electromagnetic field (which she has done in the past). With that said, she can also create one around a metal object and manipulate the electromagnetic energy, which will then cause the object to move or bend. This is how Magneto does it.
Electromagnetism manipulation isn't just a Magneto thing. Storm also uses that same energy in concert with the other forces Magneto does not control– to control the weather. So if Storm can only manipulate the energy system that factor the weather i.e. electromagnetism then there is more that can be done, since Storm's Mutant abilities encompasses more than mere weather control – and at the same time it would still fall under atmospheric phenomena or weather manipulation.
I personally like this idea. I think it be cool to have her do something 'creative' with her powers so she could flaunt these deadly abilities on occasion than just rely on lightning attacks. Now, I'm not suggesting that Storm should be the mistress of ferromagnetism or take a robot apart and turn them into an airplane the same way Magneto does. But when Storm is faced against an enemy - like hundred sentinel robots made of metal - instead of sending down lightning bolts to strike them, which doesn't seem to do anything to them, they should have her use ferromagnetic manipulation to rip these robot sentinels to shreds.