Why Spark is coming in Isolator in Tamil

Here we are going to see why spark is coming in isolator at the time of opening and closing operation. and also about ionization. What is ionization? Atom from neural change into positive or negative charge because of lossing electron or proton due to external force this is know as ionization. and also about plasma how plasma is created? The Plasma is created when the ionizated air start to conducted current flow on it and subject to strong electromaganetic field.