In figure shows a rectangular block with dimensions x, 2x and 4x. Electrical contacts can be made to the block between opposite pairs of faces (for example, between the faces labelled A-A, B-B and C-C). Between which two faces would the maximum electrical resistance be obtained (A-A : Top and bottom faces, B-B : Left and right faces, C-C : Front and rear faces)
Text Solution
Verified by ExpertsC
Let 
is the resistivity of the material
Resistance for contact A-A
Similar for contacts B-B and C-C are respectively
and 
It is clear maximum resistance will be for contact C-C.
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