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?
- 1.10 x 10-6\(\Omega\)m
- 4.25 x 10-6\(\Omega\)m
- 2.40 x 10-7\(\Omega\)m
-
1.70 x 10-8\(\Omega\)m
The correct answer is: D
Explanation
Resistance = \(\frac{\text{ Resistivity x Area}}{Area}\)
= 0.425 x 0.2 x 10-6
= 1.7 x 10-8\(\Omega\)m