Well, you could actually use electric guitar strings on an acoustic, but not necessarily use acoustic guitar strings on an electric. Electric guitars need strings that are magnetically attracted for the coils to pick up the vibrations of the strings. But you could use electric guitar strings on an acoustic. However, they often tend to be lighter gauge strings and likely will sound a little tinny and probably won't have the depth of sound you would expect as the acoustic needs more meat (for lack of a better word) to drive the sounds. Some people adjust for using electric strings on an electric acoustic by upping the volume and messing with the equalizer.