Michael
Faraday's work is vast, as he made great contributions not
only physics, but also to mathematics and chemistry. He made
two laws within the field of electrolysis, and created a
couple of equations that articulate how electromagnetism
works. But a really big thing that Faraday did was to create
the first generator. He did this by slowly running a magnet
through a coil of copper wire that was connected to a
galvanometer (device that detects current). With this he
was able to first demonstrate the principles of induction, or
essentially moving electrons by the force exerted by an
electric field. This was a revolutionary discovery, as
hydroelectric, wind, and coal generators use the exact same
principle today to create the amount of electricity that we
use enable to live life normally. And while the human body
doesn't really use induction, it's good to keep in mind that
this is how we create the vast majority of electricity today
for all of our everyday appliances.
https://en.wikipedia.org/wiki/Faraday%27s_law_of_induction