Sunday, 5 April 2020

electromagnetism - How does an electric field come inside a conducting wire inside the circuit?



This has been a really great confusion for me now ....


Many places I have read in books that when a potential difference is applied across the ends of a wire a constant electric field is generated inside it which drives the current through it...


My question is how is this electric field generated? Why is it constant in magnitude throughout the wire? What is the mechanism of flow of current inside the wire?



And


What all things happen inside the conductor just after closing the switch and before the low of constant current through it?




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