Recent content by holacola

Ahhhh. Ok. I think I understand. H is essentially B - M. We can use Ampere's Law to get H, and then add on M to get B, which will be much larger than it was before. From there, the result follows directly that the current decreases as the core is inserted, then returns to its original value.

If the iron is not permanently magnetized, it won't change the flux, and the current won't change. If it is permanently magnetized, the change in flux depends on its orientation. The current can do whatever as the flux changes, then return to its original value.

The current is constant DC. Ferromagnets are permanent magnets. This is named after iron, commonly a permanent magnet. Diamagnetic materials, when placed inside a magnetic field, create an opposing field. Paramagnetic materials create a parallel field. Isn't this correct? I don't...

So the answer should be nothing, since normal iron is non-magnetic?

Homework Statement You have a circuit with current I running through a solenoid. You insert a small piece of iron into the coil; what happens? Homework Equations d(Magnetic Flux)/dt = -EMF The Attempt at a Solution Iron is diamagnetic, so inserting it will decrease the magnetic field...