A wire of length 15m made of a material of resistivity 1.8 x 10-6(Omega)m has a resistance of 0.27(Omega). Determine the area of the wire
-
A.
1.5 x 10-4m2 -
B.
1.0 x 10-4m2 -
C.
2.7 x 10-5m2 -
D.
7.3 x 10-6m2
Correct Answer: Option B
Explanation
Resistivity = (frac{text {Resiatance x Area}}{length})
1.6 x 10-6 = (frac{15 times Area}{0.27})
Area = 1.0 x 10-4m2