Who invented the battery in 1800?

• A. Alessandro Volta
• B. Nikola Tesla
• C. Andre Marie Ampere
• D. Galileo Galilei

Answer: (A)

A steady, continuous electric current comes from a reliable chemical source, which Volta provided with the voltaic pile. He arranged alternating discs of zinc and copper separated by an electrolyte-soaked material, creating a sustained flow of electrons and thus a continuous current. This was the first true electrical battery, allowing practical electricity generation and helping launch electrochemistry. The other figures listed are important in science, but they did not invent the battery: Tesla advanced alternating current systems, Ampere contributed to electromagnetism and is the namesake of the unit of current, and Galileo made foundational observations in astronomy and physics.