In an aluminium(Al) bar of square cross section,a square hole is drilled and is filled with iron(Fe) as shown in the figure.The electrical resistivities of Al and Fe are 2.7×10^{8}\,\,{m}\ {and}\ 1.0×10^{-7}\,\,{m},respectively. The electrical resistance between the two faces P and Q of the composite bar is [JEE Adv 2015 P1]

Question

Examsnet · Accepted Answer

Correct Answer is : 187564 μΩ1875/64\,641875​μΩ

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