Electric materials
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The discovery of the working mechanism of all vacuum electronic devices (thermoelectronic radiation) was made by Thomas Edison in 1883,...
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Permanent magnets are pieces of iron, steel, and some iron ores that have the ability to attract other pieces of the same metals....
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At the beginning of the 19th century, scientists began to create devices for obtaining high alternating voltages. Heinrich Hertz in his...
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For more than 100 years there has been a debate over who actually invented the radio. The title of radio inventors is attributed to Heinrich Hertz,...
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The first methods of obtaining electric charges and electrostatic fields consisted in rubbing different materials (fur, wool, silk,...
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