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  • The specific resistance of a wire is ?, its volume is 3m3 and its resistance is 3 ohm,what will be its length?

The specific resistance of a wire is ?, its volume is 3m3 and its resistance is 3 ohm,what will be its length?

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resistance R = ρ L / A , 

       we have Volume V = A L     => A = V / L
 
      ρ = A R / L = V R / L²

     L² = V R / ρ =  3 * 3 / ρ

          L = 3 / √ρ  meters.

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Deependra Verma

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