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- Thread starter bgorm
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tiny-tim

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Hi bgorm! Welcome to PF!

A changing magnetic field will make

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Thanks for your reply. I understand what you are saying. My question is more do physicists know why this occurs. For example, physicists know about the effects of gravity but don't understand what causes it. I was curious if this is also true for electromagnetic induction.

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similar to that of a moving charge producing a magnetic field.

u were right about knowing the effects of gravity but not knowing their cause. there is no quantum theory of gravity yet & this is a topic many researchers are pondering over.

fortunately we have a quantum thory for EM - quantum electrodynamics.

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These laws are axioms, meaning that they are not derived from anything more fundamental. Lorentz later published his force equations which describe the force acting on an individual charge in the presence of E & B fields.

We know that e/m induction takes place, & we can predict its behavior mathematically, but I don't think anyone can say WHY. It's like asking why gravity exists, or why electrons & protons have charge while neutrons don't. It just happens to be that way. Sorry if that is not the answer you are looking for, but that is quite a tough question.

Claude

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