Dimensions of a block are $1\,cm \times 1\,cm \times 100\,cm$. If specific resistance of its material is $3 \times {10^{ - 7}}\,ohm - m$, then the resistance between the opposite rectangular faces is
A$3 \times {10^{ - 9}} \,ohm$
B$3 \times {10^{ - 3}} \,ohm$
C$3 \times {10^{ - 5}}\, ohm$
D$3 \times {10^{ - 7}}\, ohm$
Medium
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B$3 \times {10^{ - 3}} \,ohm$
b Length $l = 100\,cm =1\,m$
Area of cross-section $A = 1 \,cm \times 1 \,cm= 1\, cm^2 = 10^{-4} \,m^2$
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