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Grade 12Modern Physics

An electric cable is of length 2km and cross_sectional area of 0.035m2 and made out of a material whose resistivity is 7.0*10-7.determine its resistance

Profile image of David
8 Years agoGrade 12
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1 Answer

Profile image of Sreelakshmi
8 Years ago
As we know,
R = rho*l/A (where r is the resistance,rho-resistivity,l-length and a- area)
   = 7*10^- 7*2000/.035
=.04
Hope this helps..

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