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The resistance of a material with conductivity 2millimho/m^2, length 10m and area 50m is(a) 500(b) 200(c) 100(d) 1000This question was posed to me during an interview.I want to ask this question from Real Time Applications in section Electrostatic Fields of Electromagnetic Theory

Answer»

The CORRECT answer is (c) 100

The explanation: The resistance is given by, R = ρL/A, where ρ is the RESISTIVITY, the inverse of CONDUCTIVITY. R = 10/(0.002 X 50) = 100 OHM.



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