What is change in the magnetic flux (delta B)? Like on this site.
Well the magnetic flux is given by [itex]\Phi=BA[/itex] where B is magnetic flux density and A is the surface area.
So a field interacts with another magnetic field then the value of B changes and hence there should be a rate of change of flux. And by faraday's law, and emf is induced.
Is it like, when I approach magnet, than the magnetic domains of the coil get in line with the magnetic field of the magnet and when I get back the magnet, the magnetic domains of the coil are like in the first position? I mean, for the direction of the magnetic flux.
Can somebody help me to determine the direction of the magnetic flux of the coil?is that, something to do with the aligning of the magnetic domains?
A coil like a solenoid? if so then to determine the direction of the magnetic flux you need to use the right hand grip rule
But, I thought in practical way. What happens with the flux?
And can you please explain me this quote from "Newton Ask A scientist"
How is it possible that increasing the amount of air will change the direction of the beads?
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