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Originally posted by kwakakev
reply to post by OccamAssassin
I do understand now what you are getting at with Kirchhoff's Law. With your battery or solar cell the number of electrons remain the same, they just move from the anode to the cathode and keeps the particle count of the circuit constant. With a battery this results in a flat battery, but with the solar cell the electrons just go around the circuit again as long as there is light.
So what about the crystal radio? The antenna is the anode and the ground the cathode, this is not the typical closed circuit. There is a flow of electrons from the antenna to the ground so how does the antenna resupply it's electrons?