Electrical conductors and insulators

04.19.2020
09:20:32
Science/ grade 6- Today’s topic - The voltaic pile- learner’s book- pages 92 and 93.
Main points-
The voltaic pile was the first electrical battery that could continuously provide an electric current to a circuit. It was invented by Italian physicist Alessandro Volta, who published his experiments in 1799. The voltaic pile then enabled a rapid series of other discoveries including the electrical decomposition (electrolysis) of water into oxygen and hydrogen.

Volta's invention was built on Luigi Galvani's 1780s discovery of how a circuit of two metals and a frog's leg can cause the frog's leg to respond. Volta demonstrated in 1794 that when two metals and brine-soaked cloth or cardboard are arranged in a circuit they produce an electric current. In 1800, Volta stacked several pairs of alternating copper (or silver) and zinc discs (electrodes) separated by cloth or cardboard soaked in brine (electrolyte) to increase the electrolyte conductivity.[3] When the top and bottom contacts were connected by a wire, an electric current flowed through the voltaic pile and the connecting wire.









Homework worksheet is given on conductors and insulators.