Final answer:
Nikola Tesla was a proponent of Alternating Current (AC), which ultimately prevailed in the 'War of the Currents' against Thomas Edison's Direct Current (DC) due to its greater efficiency and longer transmission capabilities. The correct answer is 1) Alternating Current (AC).
Step-by-step explanation:
Nikola Tesla was on the side of Alternating Current (AC) in his famous feud with Thomas Edison. Edison, who favored Direct Current (DC), established a DC power-distribution system and engaged in a heated public relations battle to promote it, despite the technical advantages of AC.
George Westinghouse and Tesla promoted AC power, which allows for transmission over greater distances and has lower power losses at high voltage. The advantages of AC power, including the ability to use transformers, eventually led to its predominance in electrical power distribution systems.
By 1892, AC had become the primary method of electrical distribution, with even Edison's company beginning to manufacture AC equipment.
Nikola Tesla was on the side of Alternating Current (AC) in the famous feud with Thomas Edison. While Edison promoted Direct Current (DC) power, Tesla advocated for AC power.
The conflict between them, known as 'The War of the Currents,' was centered around the debate over which type of electrical power was more efficient and practical.