Georg Simon Ohm was a German physicist who carefully studied the flow of electricity in the early nineteenth century. At that time electricity was still poorly understood and many results seemed confusing. Ohm believed that clear rules could be found through careful measurement and simple math.
Through many experiments he discovered a steady relationship between voltage current and resistance. He showed that when voltage increases the current also increases in direct proportion. When resistance increases the current becomes smaller. This simple link brought order to electrical science.
In 1827 he published his findings which later became known as Ohm law. At first many scientists ignored or doubted his work. With time repeated experiments proved that his rule was correct and reliable.
Ohm law is written using simple symbols to show the relationship between these three quantities. It allows engineers and students to calculate exactly how electricity will behave inside a wire or a full circuit.
Today this law is taught as one of the first principles of electronics. It guides the design of power systems devices and communication tools. Georg Ohm work continues to shape daily life through every electrical system we use.