Today, it’s hard to imagine life without electricity. It has become such an invisible part of our lives that we take it for granted—we only really notice it when the power goes out. From household appliances like fridges and washing machines, to the phones and laptops glued to our hands, electricity is what brings everything to life.
Even our most advanced tech today—from the massive servers powering AI, to the spacecraft exploring the deep solar system—would be absolutely impossible if we hadn’t figured out how to master electricity.
But fellow engineers, have we ever taken a step back to wonder: where did all this incredible progress actually begin? And why do we even call it ‘Electricity’ in the first place?
1. Static Electricity—The Amber Mystery and the Birth of “Electric”
It all started around 600 BC in ancient Greece. A philosopher named Thales of Miletus noticed something bizarre: when he rubbed a piece of amber against wool, it suddenly gained the power to attract lightweight objects like straw. Since they had no concept of atoms back then, Thales and his contemporaries simply chalked it up to some sort of ‘magical power.’
This mystery lasted for thousands of years until the year 1600. That’s when William Gilbert, in his book De Magnete, finally tried to give this phenomenon a proper scientific identity. He coined the Latin term ‘Electricus’—which was literally derived from the Greek word ‘Elektron,’ meaning amber. And that right there is the root word that eventually made its way into English as the word we know today: Electric.
The Invisible Fluid: From Speculation to Charge Theory
Fast forward to the 18th century, and the pace of discovery really started to pick up. In 1733, Charles du Fay realized there was more to this phenomenon than just a simple pulling force. He theorized the existence of an ‘invisible fluid’ that could shift around, causing objects to either pull together (opposite charges) or push each other away (identical charges).
This theory was further refined by Benjamin Franklin in 1751. Franklin came up with a brilliant twist: he proposed that the difference in charge was simply a matter of having a surplus or a deficit of just one single type of fluid. By experimenting with wool and wax, he demonstrated that the friction from rubbing them together simply shifted this fluid from one object to the other until the whole system balanced itself out.
This all culminated in Franklin’s legendary kite experiment in June 1752. He proved once and for all that the lightning in the sky wasn’t some supernatural wrath; rather, it was the exact same electrical phenomenon that happened on Thales’ piece of amber—just on a massively larger scale.
The Conventional Current Dilemma: Franklin’s Legacy
One of Franklin’s most enduring legacies—and one that still impacts us today—is his assumption about the direction of current flow. Because he figured electricity naturally flowed from a ‘surplus’ to a ‘deficit,’ he established the rule that charge moves from Positive to Negative.
Even though modern physics has proven that it’s actually the electrons doing the moving—traveling in the exact opposite direction, from Negative to Positive—Franklin’s idea was kept alive. As fellow engineers know all too well, his ‘Conventional Current’ is still used in every electrical engineering textbook worldwide, purely for the sake of consistency.
But here’s the catch: back in this era, electricity was still strictly static. It only jumped for a split second to neutralize a charge, and then… nothing. It was completely ‘stationary,’ lacking the continuous flow we actually need to power up our devices.
2. Dynamic Electricity
The modern world as we know it only truly began when electricity could finally be controlled to flow constantly. In 1800, Alessandro Volta invented the world’s first battery, known as the Voltaic Pile. This was a massive game-changer because, for the first time in history, electricity could flow continuously instead of just being a brief static spark. But that begs the question: what exactly is flowing inside those wires?
Well, in 1891, George J. Stoney gave a name to this flowing “tiny packet of energy”—he called it the Electron. Many science historians note that Stoney’s “Electron” is actually a mashup of the words Electric and Ion (with Ion being a term for moving particles coined earlier by Michael Faraday).
Not long after that, in 1897, J.J. Thomson used his Cathode Ray Tube experiment to prove that the electron wasn’t just some abstract theory—it actually had a physical form! Thomson initially wanted to name them ‘Corpuscles.’ However, the scientific community found that word way too hard to spell, and they were already much more comfortable with the term ‘Electron,’ which had deeper historical roots.
Ultimately, ‘Electron’ became the official name that we still use today. This marked the dawn of Dynamic Electricity—an era where humanity could finally control the flow of energy. At its peak, fellow engineers, the global electrical distribution system became the ultimate battleground between Thomas Edison with his Direct Current (DC) and Nikola Tesla with his Alternating Current (AC).
However, mastering this energy sparked one of the greatest debates in history: which one is superior, direct current or alternating current? We’ll break down the epic rivalry between Edison and Tesla in the next chapter.