Archive for Oersted

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1777 – Oersted – bio

Hans Christian Oersted was born in 1777 in Denmark and was a physicist and chemist. He has been given historical credit for noticing that electric currents can induce magnetic fields, thus creating the concept of “electromagnetism”. While Romagnosi discovered the relationship between electricity and magnetism about twenty years earlier, he did not investigate it in […]

1838 – telegraph

1838 is often listed as the year for the invention of the telegraph. This was when Samuel Morse first successfully tested his electrical telegraphy device in the US. Cooke and Wheatstone listed a patent in England for a similar device in 1837 as an alarm system. In 1836, David Alter, a US scientist, demonstrated a […]

1791 – Faraday – bio

Michael Faraday was born in 1791 in South London, England. Faraday studied electromagnetic fields and was also a chemist. He proposed that magnetism is a circular force and used that idea to build the first simple electric motor. He discovered electromagnetic induction and built the first generator and transformer. He discovered that a magnetic field […]