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InterviewSolution
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Define electric resistance of a conductor |
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Answer» Resistance is defined as the property of a conductor to resist the flow of charges through it. The resistance of conductor is numerically given as the ratio of potential difference across its length to the current flowing through it. The obstruction caused for the flow of the elcetric charge is the electric circuit is called its electric resistance.We know that electric resistance is directly proportional to the length and inversely proportional to the area of the wire, if the length is doubled resisatace will be doubled but again it is halved so double of the previous resistance will be halved further. That is 2R/2= R. So, There will be no change in the net resistance If both the length and athe area are doubled.Resistivity does not change with area and length because it is the property of the material . |
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