Nikola Tesla made significant contributions to the development of electricity, including the invention of the induction motor and the design of the AC (alternating current) system, which made long-distance electrical transmission feasible. His development of the transformer and the Tesla coil advanced electrical engineering and experimental physics. Tesla's visionary ideas, such as wireless communication and renewable energy sources, laid the groundwork for modern electrical systems and technology. Despite facing challenges in securing funding and recognition, his pioneering work continues to influence contemporary innovations in both science and engineering.