The term 'Electricity Whiz' is often used to describe the inventor and engineer Nikola Tesla, who was known for his pioneering work in the field of electricity. Tesla is credited with inventing the alternating current (AC) electrical system, which is still used today. He also made significant contributions to the development of radio, robotics, and x-ray technology. Tesla's inventions revolutionized the way electricity is used and distributed, and he is remembered as one of the most influential scientists of the 20th century.