The Serbian-American inventor Nikola Tesla is well-known for his work on alternating current electrical systems. His contributions to the fields of electromagnetism and wireless radio communications have made him world-famous. This child prodigy had made the world wonder during his era. However, his life was not an easy one. Even with his sharp merit, he was a terrible businessman. Nonetheless, he was one of the most influential inventors of the 20th century, whose discoveries were way ahead of his time.