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Calculate the resistance of a 5m length of a wire of area of cross section 0.01 mm square and resistivity 50 into 10 raised to -8ohm metre

area is millimeter square.. note.



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Millimeter = 10⁻³ m

R = ρ L / A
   = 50 * 10⁻⁸ Ohm-m * 5 m / [ 0.01 * 10⁻³ * 10⁻³  m² ]
   = 250 Ohms
2 5 2
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