I would put the emphasis on the second syllable, like for magnetic. Is this incorrect? I'm a non native speaker.
As a native US English speaker, it sounds far more natural to put the emphasis on the first syllable.
A light emphasis on the first syllable would be correct. It shifts to the second syllable in a word like "heretical" (he-RET-i-cal). Webster's dictionary and Wiktionary seem to agree. Oxford would be authoritative for English itself, but I don't have access to that.