question_answer 44)

    Electrical resistivity of a given metallic wire depends upon (a) its length                       (b) its thickness                                (c) its shape                        (d) nature of the material

Answer:

                    (d) Electrical resistivity of a given metallic wire depends on number density of free electrons in the conductor which is the nature of material, i.e.,number of free electrons per unit volume. It also depends on the temperature of conductor.