The resistance of a 5m uniform wire of cross-sectional area 0.2 x 10-6m2 is 0.425….

The resistance of a 5m uniform wire of cross-sectional area 0.2 x 10-6m2 is 0.425. What is the resistivity of the material of the wire?

  • A.
    1.10 x 10-6(Omega)m
  • B.
    4.25 x 10-6(Omega)m
  • C.
    2.40 x 10-7(Omega)m
  • D.
    1.70 x 10-8(Omega)m
Correct Answer: Option D
Explanation

Resistance = (frac{text{ Resistivity x Area}}{Area})
= 0.425 x 0.2 x 10-6
= 1.7 x 10-8(Omega)m

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