? And questions like that. However the qualitative effects that arise due to the model would surely be discussed. 3Before embarking upon to the exciting journey of electricity and magnetism let us discuss some things that are not related to the subject matter directly but knowing these things help us a lot in getting the picture clearer. First of all let us discuss what actually energy is? Energy is the abstract idea that changes the state of universe i.e. we know how energy manifests itself in the universe but we surely don't know what it is that moves the whole universe. We only know that whenever any thing goes from the state of lower energy to that of higher one, energy is required to bring about that change. ( e.g. boiling of cold water). Similarly whenever any thing goes from the state of higher energy to that of lower energy, energy is released. We also know that energy can neither be created nor it can be destroyed. Therefore the energy always remains constant. It is only transformed from one place to the other and this transfer of energy is called force. Whenever we say that some body this means that some energy is being transferred in the infinitesimal
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