A wire has the same resistance as the one given in the figure. Calculate its resistivity if the length of the wire is 10m and its area of cross section is 2m.(a) 16 ohm-metre(b) 8 ohm-metre(c) 16 kiloohm-metre(d) 8 kiloohm-metreI had been asked this question in homework.The doubt is from Resistivity topic in division Simple DC Networks of Basic Electrical Engineering

A wire has the same resistance as the one given in the figure. Calcula

1.	A wire has the same resistance as the one given in the figure. Calculate its resistivity if the length of the wire is 10m and its area of cross section is 2m.(a) 16 ohm-metre(b) 8 ohm-metre(c) 16 kiloohm-metre(d) 8 kiloohm-metreI had been asked this question in homework.The doubt is from Resistivity topic in division Simple DC Networks of Basic Electrical Engineering
Answer» CORRECT answer is (b) 8 ohm-metre The EXPLANATION is: From the given circuit, R=V/I = 200/5 = 40ohm. Resistivity= RESISTANCEArea of cross SECTION/ LENGTH of the wire. Resistivity= 402/10= 8 ohm-metre.

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