This question already has an answer here:

What actually happens inside a loop when placed in a changing magnetic field that EMF gets induced across it? And also if it is connected and the direction of the magnetic field is changed then subsequently the direction of flow of current changes. To sum up I would like to ask the scientific reason behind the Faraday's law.


marked as duplicate by Ben Crowell, Kyle Kanos, Buzz, stafusa, M. Enns Jan 11 at 2:06

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.


When a magnetic field is changed the ELECTRO MOTIVE FORCE is generated in it , because. ,, when magnetic field is changed, the equilibrium of electrons are changed,, causing to experience both magnetic and electric forces and the change in the electromagnetic field, causes excitation in electrons, which makes the charge to flow across the conductor at a time, even POTENTIAL difference being generated in it, hence it causes EMF...



That is the correct answer. Feynman explains why he cannot explain why magnets attract and repel. This is a related question.

You can either start with Maxwell's equations and mathematically prove that the emf is generated in the coil. Or you can experimentally demonstrate that it does.

  • 2
    $\begingroup$ Answers on SE are generally expected to be self-contained, not just references to outside sources of information. The fact that the link is to a video is an additional problem, because it's very time-consuming for people to click through and watch enough of the video to see what it's about. What Feynman says in this video is mainly philosophical, and only tangentially about magnetism. Moreover, the question he's answering about magnetism isn't the same as this question, and your summary is not IMO an accurate summary of the philosophical views he expresses. $\endgroup$ – Ben Crowell Jan 2 at 15:23
  • $\begingroup$ I understand. But from the tone if the question, that is what I thought the questioner was looking for. Why there is an emf? As I said you can either use maths or experiment $\endgroup$ – Dr S T Lakshmikumar Jan 3 at 6:13

Not the answer you're looking for? Browse other questions tagged or ask your own question.