calculate the resistance of a copper wire of length 1m and the area of cross section 2m²(resistivity of the copper is 1.7×10¯8
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As we know
R=el/A
Where
e=resistivity
l=length of wire
A=area of cross section
R=1.7 x 10¯8 x 1/2
R=8.5 x 10¯9 ohm
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