# A wire of Length L and resistance R is stretched so that its length is doubled and the area of cross section is halved ,How will its a. resistance change ?b.resistivity change

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B) Resistivity depends only on the material of conductor and its temperature. Resistivity increases with temperature.

So, when we increase the length and decrease the cross-section area ; then still the material isn't changed and the temperature isn't changed. Therefore, the resistivity remains the same.