Both physicists developed really powerful laws which still nowadays rule the electronic behavior of circuits.
These help us every day to solve problems, calculate circuit variables… but how did engineers do it before the said laws were discovered?
If alternative laws which would not be accepted nowadays were used before this, would this mean that the research done until the discovery of the laws was wrong? Did Kirchhoff and Ohm themselves rely on wrong theories to create 'the good one'?
Best Answer
This is a bit like asking how Aztecs built cars without the wheel: they didn't.
There was a chain of invention by scientists in the early 1800s building off each others work. Prior to then there was only electrostatics: Benjamin Franklin rubbing insulators together and noting charged objects attract and repel. Leyden jars.
In 1800 Volta invented the battery or "pile". This allowed experiments with a constant source, rather than ephemeral electrostatic discharge. That led to Davy inventing the arc lamp, and Ohm in 1827 quantifying this electricity. Then Faraday's work on electromagnetism, allowing generators, dynamos and motors.
Engineers turning it into a "product" came later. Swan and Edison both invented the light bulb; Edison, Tesla and Westinghouse fought over distribution.
There's a little discussion of Kirchoff and Ohm here.
Which suggests that the answer was yes - people were building off incorrect theory to some extent. In the case of Ohm, he was building off Fourier's work on heat conduction. Electrical conduction is similar but not exactly the same.
There isn't anything on quite the scale that "phlogiston" was in chemistry - a controversial popular theory that ultimately turned out to be wrong.