A simple eletricity problem!
Electricity and Magnetism
Level
2
The ratio of masses of two copper wire of same length are 5:3,then find the tatio of their resistances
12:37
3:5
9:25
5:3
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1 solution
From the given informations, the ratio of the cross sectional areas of the two wires is 5 : 3 . Since resistance is inversely proportional to the cross sectional area, the required ratio is 3 : 5 .