Is Brass rod electromagnetic ?
No. Brass is an alloy of copper and zinc, neither of which is ferromagnetic.
As I reread your question, I don't believe I answer it adequately. I said it isn't ferromagnetic. That is true; however, you didn't ask that. A brass rod IS a conductor of electricity and as such is capable of generating an electric current when used in a generating capacity. Here are a couple of links to let you read more about it.
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