Physics-
General
Easy

Question

Consider a thin square sheet of side L and thickness t comma made of a material of resistivity rho. The resistance between two opposite faces, shown by the shaded areas in the figure is

  1. Directly proportional to L    
  2. Directly proportional to t    
  3. Independent of L    
  4. Independent of t    

The correct answer is: Independent of L


    R equals fraction numerator rho open parentheses L close parentheses over denominator A end fraction equals fraction numerator rho L over denominator t L end fraction equals fraction numerator rho over denominator t end fraction
    i e comma blank R is independent of L.
    Hence the correct option is (c).

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