Recent content by lxrose

If anybody else still reading this thread, could he or she explain the "extra" energy that is required by me if we compare the following two cases. Moving the magnet inside the coil with normal speed and distances back a forth. (This is harder to push.) Moving the magnet inside the same coil...

I think I simplified it by taking only a small part, so we can agree on the most basic part of magnetic induction. Perhaps you cannot explain the whole thing together, that's why you don't want to answer this piece otherwise I don't see why you leave right now if you answered all before.

If we focus only on the time range when I move the magnet in the coil at constant speed, it should be the simplest case. What happens with the lightbulb? What about the force I need to act against?

I don't think it makes things much more complicated if there is some time in the setup when the magnet moves at constant speed. In the beginning I described two ways to do the experiment, and since it is only in thought we can play with some details. My goal is not to find a way to create a PM...

So the magnets own magnetic field acting against the magnet. It might explain what happens during acceleration, but does not explain the constant speed motion that may come after it finished acceleration, but before the counter effect occurs. Or during constant speed of the magnet there is no...

I mean the fields not acting against my hand...

Yes, in the case of the swing there is friction due to air and the swing itself. But in our case what is the way a force acting upon my hand when I push and pull the magnet if it is not the force of the fields interacting?

Thanks for joining to the conversation. I meant resistance as we use in everyday language, but it may not be the correct English word for this. Most of the time I am trying to find the right words as used in physics, because I learned physics in Hungarian. Thanks for your detailed clarification.

In the case when I continuously push the magnet, the "resistance" of the generated magnetic field needs more energy from me which is converted to electric energy. But in the case above we are talking about a magnetic field which helps to move, so what explains the effect you wrote in your first...

I don't know where I am wrong but I think it cannot work that way. Here is my reasoning. Let's compare the following two cases. Case no 1: I move back and forth a piece of metal. Case no 2: I move back and forth a piece of magnet with the same weight (and mass of course) inside a coil which has...

You got what I meant, it seems. I need to think more about this. Thanks for your answer.

So depending on the size of the coil and the duration of the movement the generated magnetic field either helps or slows the movement of the magnet? The initial movement can be short then the magnet could oscillate by itself while emit some EM radiation. Magnets can be strong, what would prevent...

Yes I know that, but I still don't understand the situation. I thought that working with a "human delay" can help to enlighten the problem better, or I will get an answer that I understand. I know mostly what the first answer is trying to say, but something is still missing for me.

Thanks for your answer. In a thought experiment one can create a coil with a huge diameter like a couple thousand miles or kilometers. In this case the frequency can be low. What's the explanation of the magnet not moving back and forth of its own after pushing it for the first time?

Thanks, I am sure too. :-)