I need to know what is the difference between an electromagnetic wave and a radio wave?
I came to know that frequencies below 3 kHz are electromagnetic waves but are they photos or something else?
If an iron core coil rod is connected with a frequency oscillator and AC is applied to the coil...
I bought a diametrically magnetised magnet like this (https://www.first4magnets.com/circular-disc-rod-magnets-c34/20mm-dia-x-20mm-thick-diametrically-magnetised-n42-neodymium-magnet-p3641) some time ago to build an electric generator.
I have been reading a little bit of information on the net...
I bought some weeks ago an electrical generator that uses water pressure to produce electricity.
I have disassembled the generator and I don't fully understand how it works.
It is like this one:
The motor
I supose that there is a magnet somewhere that alternates between north and south...