TESLA AND METROLOGY – FROM COILS TO A UNIT OF MEASUREMENT

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Nikola Tesla was one of the greatest inventors and visionaries of the modern age. His breakthroughs in electrical engineering and electromagnetism shaped the world we live in today. Tesla is also a key link between Croatia and global science and metrology.

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Nikola Tesla (1856–1943) was born in Smiljan, in the region of Lika. He studied engineering in Graz and Prague, and spent most of his life in the United States. There he developed inventions that transformed the world — the alternating current (AC) system, the induction motor and the transformers that made long-distance transmission of electrical power possible.

(Visual 1: Portrait of Nikola Tesla, Napoleon Sarony (1821–1896) / Source: Wikimedia Commons)

 

Tesla was a pioneer in high-frequency currents, wireless transmission of signals, and radio technology. His experiments inspired the development of radio, television and remote control. Many of his ideas — such as wireless power transmission — continue to inspire new generations of scientists and engineers today.

(Visual 2: Nikola Tesla in his Colorado Springs laboratory, 1899 / Source: Wikimedia Commons)

 

Many of Tesla’s inventions are still used in metrology. Transformers are indispensable in electrical measurement laboratories because they allow precise adjustment of voltage and current. Induction motors are used in equipment for testing and measuring power and efficiency. Tesla’s high-frequency currents form the basis of modern radiometry and precision electronic measuring instruments.

(Visual 3: Regulation transformer within a voltage stabiliser in a calibration laboratory / Source: Zavod za ispitivanje kvalitete d.o.o.)

 

The SI unit of magnetic flux density — the tesla (T) — is named in his honour. It is one of the rare metrological recognitions to carry the name of an inventor, reflecting how deeply his work shaped our modern understanding of electromagnetism.

(Visual 4: Definition of the tesla derived from the kilogram, ampere and second)

 

Today, Tesla’s name connects Croatia’s scientific heritage with global knowledge. The Nikola Tesla Technical Museum in Zagreb, which bears his name, preserves the memory of the inventor and brings his genius closer to new generations.

(Visual 5: Building of the Nikola Tesla Technical Museum in Zagreb / Source: Technical Museum Nikola Tesla)