The discussion centers on the concept of change in magnetic flux (delta B) and its implications as described by Faraday's Law of Electromagnetic Induction. Magnetic flux (\Phi) is defined as the product of magnetic flux density (B) and surface area (A). The interaction between magnetic fields induces electromotive force (emf) in coils, such as solenoids, which can be determined using the right-hand grip rule. The conversation also touches on Lenz's Law, illustrating how changes in external conditions can affect the direction of magnetic domains within a coil.
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Physicsissuef said: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?
But, I thought in practical way. What happens with the flux?rock.freak667 said: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
How is it possible that increasing the amount of air will change the direction of the beads?These days, most hula hoops have beads in them. Let's pretend that if
the beads move inside the hoop they will generate wind through the hoop.
Let's say if they go clockwise, they generate a wind going in the direction
a screw would go if the beads were turning it. Let's say if you increase
the amount of air going in that same direction through the hoop, the beads
will feel forced to move (so far we have Faraday's law) counter-clockwise
(now we've added Lenz's law).