Physicaleducation

Hey guys I'm new to these forums and just had a question. If this is in the wrong place I will move it. I know for a fact that when electricity is placed upon a spring it compresses the spring. So my question is, if I can compress the spring to where it presumably has the max amount of EP in that system. And than I let stop the flow of electricity will the spring stretch at a slow pace or at a really high pace? And will all the EP just convert into EK? For eg. If I have a small weight on top of the spring that is too light to compress it by itself. And than I compress it using the electricity to its near max EP. If I shut off the flow, will the spring elongate and send that weight flying into the air? Thanks for reading and advice in advance!