If the radius of cooper wire is double what will be effect on specific restistivity
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The resistivity of the wire will be the same
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we know,
where ,
R = resistance of wire
ρ = specific resistance
L = length of wire
A = cross section area
here, we know specific resitance is a proportionality constant. and it is metallic property. it doesn't depend upon dimensions of metals.so, we can say that if radius of wire is doubled then specific resistance won't change
where ,
R = resistance of wire
ρ = specific resistance
L = length of wire
A = cross section area
here, we know specific resitance is a proportionality constant. and it is metallic property. it doesn't depend upon dimensions of metals.so, we can say that if radius of wire is doubled then specific resistance won't change
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