A cylindrical metal wire of length ‘L' and cross-sectional area S, has resistance R, conductance G, resistively and conductivity σ. Which one of the following expression for 0 is valid?

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A cylindrical metal wire of length ‘L' and cross-sectional area S, has resistance R, conductance G, resistively and conductivity σ. Which one of the following expression for 0 is valid?






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