Answer to Question #238206 in Electricity and Magnetism for Pheladi

Electricity and Magnetism

Question #238206

Resistance of a wire is y ohm.the wire is stretched to triple it's length,then the resistance becomes

Expert's answer

initial length = L

final length = 3L

initial resistance = y

"R_2 =n^2R_1 \\\\\n\nR_2 = 3^2y \\\\\n\nR_2 = 9y \\; ohm"

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