A question used for effect which does not require an answer is
Answer Details
A question used for effect which does not require an answer is called a rhetorical question. It is a figure of speech used to make a point or persuade the audience. The speaker already knows the answer to the question, and the audience is not expected to answer it. Rhetorical questions are often used in speeches, debates, and other forms of communication to engage the audience and emphasize a point.