Multiple choice general knowledge history The second atom bomb was dropped on Nagasaki on aug 6, 1914 aug 9, 1945 aug 6, 1943 aug 9, 1943 Reveal answer Fill a bubble to check yourself B Correct answer Explanation The second atomic bomb used in warfare was dropped on Nagasaki, Japan on August 9, 1945, by the United States. The first bomb had been dropped on Hiroshima three days earlier on August 6, 1945.