What is the name of Bob Dylan's album that marked his transition from acoustic to electric music?

The name of Bob Dylan's album that marked his transition from acoustic to electric music is Bringing It All Back Home.

Released in 1965, Bringing It All Back Home was Dylan's fifth studio album and the first of his major mid-1960s albums to incorporate electric instrumentation. The original vinyl's first side features Dylan backed by an electric band on songs such as “Subterranean Homesick Blues” and “Maggie's Farm.” The second side is primarily acoustic, making the album a literal bridge between two musical approaches.

The change shocked parts of the American folk scene, which had largely identified Dylan with solo acoustic performance and topical folk songs. His later appearance with an electric band at the 1965 Newport Folk Festival intensified the controversy, although the transition had already begun in the studio.

Listeners sometimes identify Highway 61 Revisited or Blonde on Blonde as the key electric-era albums. Both are essential follow-ups, but Bringing It All Back Home is the canonical starting point of Dylan's electric breakthrough.