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Ohm's Law
16Mar,2026
Ohm's Law
In the age of electricity, it can be easy to forget that the road to high-speed connection was long. Discoveries such as Ohm's Law can feel completely invisible when they're hidden beneath the layers of a touchscreen or the lights of a gaming system. Yet, every device we use that includes an electrical circuit relies on our understanding of Ohm's Law.
In honor of Georg Ohm's birthday (March 16th, 1789), let's explore a bit about electronic circuits.
Georg Ohm, a German mathematician and physicist, discovered that electrical current has a directly proportional relationship with voltage (and thus, an inversely proportional relationship with resistance). This is written as I = V/R (likewise, V= I x R, and R = V/I). In other words, the strength of an electrical current depends on resistance and voltage.
It can be helpful to imagine this with a water pump analogy. Let's say we've got a water pump exerting pressure. The pressure pushes water through pipes. The pressure of the water pump is like voltage, pushing electricity along a circuit through a "pipe" of resistance. Therefore, if the pressure/voltage increases and the resistance (pipe) stays the same, the current/flow rate increases.
This understanding was essential in the development of circuit theory and, as such, is named after the man who found it.
About 200 years later, students everywhere learn about Ohm's Law and apply it as they practice with breadboards, perhaps later advancing to working on more intricate devices (e.g., cell phones, computers, smart TVs, and more).
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BY : Rhiannon Nevinczenko