A stainless steel wire is 3mm in diameter and 1m in length. The resistivity of steel is 70
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first find the area of cross section of wire by using formula πr square.
given , diameter= 3mm=0.3 m
radius =0.3/2m
area of cross section =22×0.3/2 ×0.3/2
= 99/200 m square .
by using formula of resistivity,=R×A/ length
I hope you can solve it....
given , diameter= 3mm=0.3 m
radius =0.3/2m
area of cross section =22×0.3/2 ×0.3/2
= 99/200 m square .
by using formula of resistivity,=R×A/ length
I hope you can solve it....
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