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One disadvantage of DC current is it can be generated and transmitted only to shorter distance for instance within city. Tesla thought that AC will be the best alternative for this problem. Coming up with the new idea: Tesla thought on how to use the Ac current to run a motor and he understood that Ac current is periodic and it is of sine wave form so he thought that overlapping another AC current in different angle would solve the problem. This idea lead to greater invention in his life later. Joining Edision company: Tesla migrated to America to join Edision company and he got his job in Edision company after a test by Edision to repair the broken generator Reason to leave Edision Company: Tesla leaved Edision Company since he considered Edision has fooled him by offering him bonus for completing a problem in his generator but as promised his bonus was not given so he left Edision company. Tesla life after that incident: Tesla found a...

Thinking about the one invention that led to the technological advancement of the human race in this 21-st century  electricity come to the mind. The widely used type of electricity is AC (alternating current). Do anyone know who proposed the idea of using AC current for providing electricity ? Have you heard the name Nikola Tesla if you already know reply in comment else lets see who is Nikola Tesla Nikola Tesla was born in 10 July 1856 in Smiljan, Lika which is modern day Croatia. His full name is Nikola Milutinov Tesla. His childhood he had a brother who is affected with a strange disease which has a symptom of showing illusion in front of eyes which has happened in the past. So his brother died in a early age in front of eyes of young Tesla falling from a horse. This event affected Tesla mentally. Tesla later found that he too was affected with that strange medical condition he used t...