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Question

If a wire of resistivity (ρ) is stretched to thrice its initial length, what will be its new resistivity?


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Solution

  • Resistivity is an intrinsic property of the material that measures how strongly a material opposes a flow of current through it.
  • It depends on the nature of the material and the temperature of the material.
  • It is independent of the physical dimensions of the material.
  • Therefore, when the wire is stretched to thrice its original length, the resistivity remains the same.

Final answer: New resistivity will be the same as the initial resistivity.


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