Where do you put the apostrophe in word minds this sentence The light bulb dims?

You don't need an apostrophe in the word "minds" in the sentence "The light bulb dims."

The apostrophe is used to indicate possession (e.g., "the cat's tail") or contractions (e.g., "it's"). Since "minds" is not possessive or a contraction, it doesn't need an apostrophe.