What is Nikola Tesla background?

Answer 1

From the time he was a child, Tesla was always considered eccentric. Shortly after his graduation from high school, Tesla suffered a devastating bout with cholera and nearly died. He was bedridden for nine months, and doctors announced that he would not live much longer. Tesla asserted that it was not until he reached adulthood that he discovered he was an inventor. Tesla began his college education at Graz Polytechnic Institute, pursuing studies of the topic that fascinated him above all others: electricity. The 'Tesla Coil' is a device invented by him. It is a high voltage, high frequency, power generator, primarily built for conducting experiments and to observe phenomenon associated with alternating electricity. With this coil, Tesla was able to generate voltages of such magnitude; they would shoot out of the apparatus as bolts of lightning.

He wanted everyone to have electricity for free. That didn't work for the money makers of the day. The invention he is most known for is the ac electricity system which the whole world uses to light houses and other buildings.