Question

two Copper wire of length 2 metre and another of length 6 m are found to have the same resistance their diametere are in the ratio of

Answer 1

Answer:

To retain the same resistance, diameter of the wire can be increased as it is inversely proportional to the resistance. As the area of cross section is square of the diameter, when the diameter of the wire is increased by 3 times, the resistance remains the same. Hence, Their diameters are in the ratio 1:3.

Step-by-step explanation:

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