Massive objects and electric forces

AI Thread Summary
The discussion centers on the relative weakness of electric forces compared to gravitational forces in massive bodies like humans and planets. Participants express confusion over why the Earth does not levitate humans as magnets do with small objects, despite the presence of electric forces. The net charge of the Earth and humans is questioned, with an emphasis on understanding how these charges interact with gravitational forces. The conversation highlights the fundamental differences between electric and gravitational forces, particularly in terms of scale and effect. Overall, the discussion seeks clarity on the nature of electric forces in relation to large masses.
pentazoid
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I can understand why the gravitational force is weak for subatomic particles like the electron and the proton , since they have extremely minuscule masses. I don't understand why the electric force is soo weak for massive bodies, like humans and planets. Why isn't the Earth able to levitate humans beings like an iron magnet is able to lift up small objects?
 
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What is the net charge of the earth? Or a human?
 
Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

So here is the motional EMF formula. Now I understand the standard Faraday paradox that an axis symmetric field source (like a speaker motor ring magnet) has a magnetic field that is frame invariant under rotation around axis of symmetry. The field is static whether you rotate the magnet or not. So far so good. What puzzles me is this , there is a term average magnetic flux or "azimuthal mean" , this term describes the average magnetic field through the area swept by the rotating Faraday...
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