Question

explain why does a metal wire when connected to a cell offer resistance to the flow of current.

Answer 1

Current flows in a wire due to flow of electrons in an opposite direction. Now there are some positively charged particles too. So when electrons flow from the negative electrode to the positive electrode, there occurs collisions between the positively and negatively charged particles due to which the current cannot flow freely. This is called resistance. (The obstruction offered to the flow of current).

Thus the wire offers resistance.

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Answer 2

"An electric current flows when Electrons move through a conductor, such a metal wire. The moving electron can collide with ions in metal..... The resistance of a thin wire is greater than the resistance of a thick wire because a thin wire has fewer Electrons to carry the current ....... "