A correlation is a single numerical value that is used to describe the relationship between two variables. All correlations have strength and direction. When two variables have a positive correlation, that means the two variables move in the same direction. The closer a positive correlation is to 1, the stronger it is.
William Gilbert discovered electricity, not Nikola Tesla. Nikola Tesla invented things. not discovered electricity. Again, William Gilbert discovered it and named it. He did this in the 1600s. It wasn't Nikola Tesla.
Electricity is the energy produced by the nature, but it took lot of years for the humans to appreciate how electricity can be used to get things done. It is defined as the flow of charged particles named electrons via a conductive medium. Even though, everyone in the world are using electricity, no one can answer the query â who invented electricity â in just one word. The invention of electricity was a big history and lot of scientists took part in it.