The Resistance of a metal wire of length 8m is 100ohms. If the area of cross section of the wire is 4 × 10 to the power-7 me.. calculate the resistivity of the metal..
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Explanation:
Given
resistance of the metal wire (R)=100ohms
length of the metal wire (l)=8m
Area of cross section (A)=4×10^-7m^2
Resistivity (p)=RA/l
=100×4×10^-7×1/8
=5×10^-6 ohm-m
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