“Our virtues and our failings are inseparable, like force and matter. When they separate, man is no more.”
—Nikola Tesla

Inventor Nikola Tesla contributed to the development of the alternating-current electrical system that's widely used today and discovered the rotating magnetic field (the basis of most AC machinery).

Who Was Nikola Tesla?

Nikola Tesla (July 10, 1856 to January 7, 1943) was an engineer known for designing the alternating-current (AC) electric system, which is still the predominant electrical system used across the world today. He also created the "Tesla coil," which is still used in radio technology. Born in what is now Croatia, Tesla came to the United States in 1884 and briefly worked with Thomas Edison before the two parted ways. He sold several patent rights, including those to his AC machinery, to George Westinghouse.

Nikola Tesla’s Inventions

Throughout his career, Tesla discovered, designed and developed ideas for a number of important inventions — most of which was officially patented by other inventors — including dynamos (electrical generators similar to batteries) and the induction motor. He was also a pioneer in the discovery of radar technology, X-ray technology, remote control and the rotating magnetic field — the basis of most AC machinery. Tesla is most well-known for his contributions in AC electricity and for the Tesla coil.

AC Electrical System

Tesla designed the alternating-current (AC) electrical system, which would quickly become the preeminent power system of the 20th century and has remained the worldwide standard ever since. In 1887, Tesla found funding for his new Tesla Electric Company, and by the end of the year, he had successfully filed several patents for AC-based inventions.

Tesla's AC system soon caught the attention of American engineer and businessman George Westinghouse, who was seeking a solution to supplying the nation with long-distance power. Convinced that Tesla's inventions would help him achieve this, in 1888 he purchased his patents for $60,000 in cash and stock in the Westinghouse Corporation.

As interest in an AC system grew, Tesla and Westinghouse were put in direct competition with Thomas Edison, who was intent on selling his direct-current (DC) system to the nation. A negative-press campaign was soon waged by Edison, in an attempt to undermine interest in AC power. Unfortunately for Thomas Edison, the Westinghouse Corporation was chosen to supply the lighting at the 1893 World's Columbian Exposition in Chicago, and Tesla conducted demonstrations of his AC system there.

Hydroelectric Power Plant

In 1895, Tesla designed what was among the first AC hydroelectric power plants in the United States, at Niagara Falls. The following year, it was used to power the city of Buffalo, New York — a feat that was highly publicized throughout the world and helped further AC electricity’s path to becoming the world’s power system.

The Tesla Coil

In the late 19th century, Tesla patented the "Tesla coil," which laid the foundation for wireless technologies and is still used in radio technology today. The heart of an electrical circuit, the Tesla coil is an inductor used in many early radio transmission antennas. The coil works with a capacitor to resonate current and voltage from a power source across the circuit. Tesla himself used his coil to study fluorescence, x-rays, radio, wireless power and electromagnetism in the earth and its atmosphere.

Tesla Motors & the Electric Car

In 2003, a group of engineers founded Tesla Motors, a car company named after Nikola Tesla dedicated to building the first fully electric-powered car. Entrepreneur and engineer Elon Musk contributed over $30 million to Tesla in 2004 and serves as the company’s co-founder CEO. In 2008, Tesla unveiled its first electric car, the Roadster. A high-performance sports vehicle, the Roadster helped changed the perception of what electric cars could be. In 2014, Tesla launched the Model S, a lower-priced model that, in 2017, set the Motor Trend world record for 0 to 60 miles per hour acceleration at 2.28 seconds. Tesla’s designs showed that an electric car could have the same performance as gasoline-powered sports car brands like Porsche and Lamborghini.

When and Where Was Nikola Tesla Born?

Nikola Tesla was born on July 10, 1856, in what is now Smiljan, Croatia.

Childhood and Education

Nikola Tesla was one of five children, including siblings Dane, Angelina, Milka, and Marica. Tesla's interest in the electrical invention was spurred by his mother, Djuka Mandic, who invented small household appliances in her spare time while her son was growing up. Tesla's father, Milutin Tesla, was a Serbian Orthodox priest and a writer, and he pushed for his son to join the priesthood. But Nikola's interests lay squarely in the sciences.

After studying at the Realschule, Karlstadt (later renamed the Johann-Rudolph-Glauber Realschule Karlstadt); the Polytechnic Institute in Graz, Austria; and the University of Prague during the 1870s, Tesla moved to Budapest, where for a time he worked at the Central Telephone Exchange. It was while in Budapest that the idea for the induction motor first came to Tesla, but after several years of trying to gain interest in his invention, at age 28 Tesla decided to leave Europe for America.

Tesla and Thomas Edison

In 1884 Tesla arrived in the United States with little more than the clothes on his back and a letter of introduction to the famed inventor and business mogul Thomas Edison, whose DC-based electrical works were fast becoming the standard in the country. Edison hired Tesla, and the two men were soon working tirelessly alongside each other, making improvements to Edison's inventions.

Several months later, the two parted ways due to a conflicting business-scientific relationship, attributed by historians to their incredibly different personalities: While Edison was a power figure who focused on marketing and financial success, Tesla was commercially out-of-tune and somewhat vulnerable.

First Solo Venture

In 1885, Tesla received funding for the Tesla Electric Light Company and was tasked by his investors to develop improved arc lighting. After successfully doing so, however, Tesla was forced out of the venture and for a time had to work as a manual laborer in order to survive.

His luck would change two years later when he received funding for his new Tesla Electric Company.

Nikola Tesla’s Free Electricity Project

Having become obsessed with the wireless transmission of energy, around 1900 Nikola set to work on his boldest project yet: to build a global, wireless communication system — to be transmitted through a large electrical tower — for sharing information and providing free electricity throughout the world. With funding from a group of investors that included financial giant J. P. Morgan, in 1901 Tesla began work on the project in earnest, designing and building a lab with a power plant and a massive transmission tower on a site on Long Island, New York, that became known as Wardenclyffe.

However, doubts arose among his investors about the plausibility of Tesla's system. As his rival, Guglielmo Marconi — with the financial support of Andrew Carnegie and Thomas Edison — continued to make great advances with his own radio technologies, Tesla had no choice but to abandon the project. The Wardenclyffe staff was laid off in 1906, and by 1915 the site had fallen into foreclosure. Two years later Tesla declared bankruptcy and the tower was dismantled and sold for scrap to help pay the debts he had accrued.

Death

Poor and reclusive, Nikola Tesla died on January 7, 1943, at the age of 86, in New York City, where he had lived for nearly 60 years. After suffering a nervous breakdown following the closure of his free energy project, Tesla eventually returned to work, primarily as a consultant. But as time went on, his ideas became progressively more outlandish and impractical. He grew increasingly eccentric, devoting much of his time to the care of wild pigeons in New York City's parks. He even drew the attention of the FBI with his talk of building a powerful "death beam," which had received some interest from the Soviet Union during World World II.

However the legacy of the work Tesla left behind him lives on to this day. In 1994, a street sign identifying "Nikola Tesla Corner" was installed near the site of his former New York City laboratory, at the intersection of 40th Street and 6th Avenue.

Movies on Tesla

Several movies have highlighted Tesla's life and famous works, most notably:

The Secret of Nikola Tesla, a 1980 biographical film starring Orson Welles as J. P. Morgan.
Nikola Tesla, The Genius Who Lit the World, a 1994 documentary produced by the Tesla Memorial Society and the Nikola Tesla Museum in Belgrade, Serbia.
The Prestige, a 2006 fictional film about two magicians directed by Christopher Nolan, with rock star David Bowie portraying Tesla.
Tesla Science Center and Wardenclyffe

Since Tesla's original forfeiture of his free power project, ownership of the Wardenclyffe property has passed through numerous hands. Several attempts have been made to preserve it, but in 1967, 1976 and 1994 efforts to have it declared a national historic site failed. Then, in 2008, a group called the Tesla Science Center was formed with the intention of purchasing the property and turning it into a museum dedicated to the inventor's work.

In February 2009 the Wardenclyffe site went on the market for nearly $1.6 million, and for the next several years, the Tesla Science Center worked diligently to raise funds for its purchase. In 2012, public interest in the project peaked when Matthew Inman of TheOatmeal.com collaborated with the TSC in an Internet fundraising effort, ultimately receiving enough contributions to acquire the site in May 2013. Work on its restoration is still in progress, and the site is closed to the public “for the foreseeable future” for reasons of safety and preservation, according to the Tesla Science Center.