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A wire of length L and area of cross section is doubled on itself find the ratio of the initial resistance to the final resistance?
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A wire of length L and area of cross section is doubled on itself find...
Resistance of a wire is directly proportional to its length. Longer is the wire higher will be the resistance. Resistance of a wire mostly depends on the two variable of the wire; one is length and the other is its cross section. So, when you cut a wire into two exactly equal halves, the resistance will also be down to half.Resistivity, on the other hand, is a property of a material, so unless you change the material of the wire, resistivity will remain same. But resistivity depends on temperature. So, basically, if two parts of the wire at the same temperature, their resistivity will remain same.
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A wire of length L and area of cross section is doubled on itself find the ratio of the initial resistance to the final resistance?
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