How is the resistance of a material affected by increasing the radius of a given length of the wire by three times its original value
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First, the total length of the wires will affect the amount of resistance. The longer the wire, the more resistance that there will be. ... Second, the cross-sectional area of the wires will affect the amount of resistance. Wider wires have a greater cross-sectional area.
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Answer. When the wire is stretched to 3 times its original length, its cross section is also reduced to one third of what it was before. By using the above relation, we find the new resistance to be 3x3= 9 times of what it was before
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