Main Question or Discussion Point
if the earth is one big magnet, why there is not current induced in our selfs? I mean, why there is not electromagnetic induction in the human body?
If you have a volt meter handy, put it on the mv scale and grab the probes in each hand.
I run about 80mv on an ungrounded surface.
Why is there not a current induced in our bodies?if the earth is one big magnet, why there is not current induced in our selfs? I mean, why there is not electromagnetic induction in the human body?
no.. to produce an induced EMF in a body, there must be a time variation in the magnetic flux, which can be brought about by a time variation in either the area of the body through which the magnetic field permeates or the magnetic field or both, not necessarily the magnetic field alone.Very simple....there must be a time variation in the magnetic field to produce an induced EMF.
Not exactly...Ok, I will conclude, that there is some very low current, while we are moving, since the magnetic field is constant. So to have EM induction either we should move and the magnet should be constant or the magnet should move and we will stay, am I right?
Yes, that's correct. Also thanks for the calculation, I'll have it in mind.Not exactly...
Let me be more precise so the nit-pickers don't start on me.
The field at any point on earth is constant....so standing still (which is what you originally seemed to ask) there would be NO EMF.
Moving in a constant magnetic field will not necessarily produced the EMF either.....you must be moving in such a way that the B flux (through your body) changes .....(as Rohan has said).
Staying at one location this would generally require you to be spinning, (which I don't think you had in mind).
If you are moving linearly, you would have to go through areas of different B field strength....to get an EMF.
... makes sense?