ok badshah not too many details, but electric acoustic, is simply a acoustic guitar having pickup, nowadays mostly humbucker picups are used, the mettalic looking ones, also called lipstick pickups,
well there are electric guitars, which can mimic the sound of an acoustic guitar,
and since ur a begginner ,so don't know what ur talking about.
any type of acoustic guitar(the hollow body ones) can be used anywhere
but electric ones always need a amp