Upvote:3
Having replaced your lost passport with a new passport, you will need to apply for a new visa. A copy of a visa does not suffice.
There may be some country somewhere that is an exception to this, but since you have not said which country issued the visa, it is impossible to investigate whether it would apply in your case. I am certain, however, that the above is correct for the US, the UK, and the Schengen area.