So, the factor F is called the corona loss function, I mean you have for different ratio you can find out what is F? It varies with the ratio and is given below in tabular form I will show you.
फॅक्टर F म्हणजे कोरणा लॉस फंक्शनआहे. तर, या रेशो नुसार F हा बदलत असतो.