A:AnswerYes, this power cord is designed for use with most appliances, electronics, power tools and other devices and features a grounded outlet, so you can safely extend the length of your existing power cord.
A:AnswerIf it has a standard 3 prong plus it will. 250 is a max volt rating. No computer runs on 250v 10a. Your violin is 110 and will work fine with this cord.