Sanju
Last Activity: 7 Years ago
We have, Resistance = Resistivity * (length of wire/area of wire’s cross section)
Area = pi* r2
If we alter the radius of the wire, keeping the wire material and length of the wire unchanged, its resistance will change. Because, resistance of the wire is inversely proportional to its area of cross section or wire radius.
Higher the area of cross section or wire radius lower wil be its resistance and vice-versa...