system
Given the following post, respond as if you're commenting on Reddit:
human
[X-Men] Would Magnetos helmet prevent Professor X from using his powers?

Magnetos helmet protects him from psionic attacks which I'm guessing includes being removed telepathically (either that or he just consciously uses his powers to keep it on his head).

Would it work in the reverse? Say Magneto knocks out the Professor, straps him down and keeps the helmet on his head. Would this effectively neutralize the professor and make him powerless?

Obviously this wouldn't be a good attack strategy because there are other telepaths that could control Magneto now that he's defenceless but if they were the last two mutants standing/sitting would this be a viable way for Magneto to remove the threat of the professor without killing him?
gpt
Depends on if his telepathy originates from his brain. 

I would say that the fingers to the head, eyes closed would mean the brain is the "antennae" from which the power originates, so yes it would nullify or dramatically reduce his power. 

If his telepathy is transmitted from every cell in his body or if he has an organ somewhere aside from his noggin that acts as a focal point he would be unhindered.