A wire of length L and resistance R is streched to triple its length . How will its (1) resistance change (2)resistivity change?
reshav36:
plzzz any one give the answer
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l=3l A=A/3
R=rho×3l÷A/3=9rho l/A=9R .
.. no change in resistivity as it only depends on nature of material and temperature
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