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`        The ratio of lengths of two wires made up of the same material is 3:1 and the ratio of their radii is 1:3. The ratio of increament of lengths on account of suspending same weight will be ?`
2 years ago

Sanju
106 Points
```							We have Stress = Force/AreaArea, a = πr2    [means area is proportional to r2]Therefore, a1/a2 = (r1/r2)2 = (1/3)2 = 1/9S1/S2 = [F/a1] /  [F/a2] = a2/a1 = 9/1    [Same weight means force is same and gets cancelled each other]The ratio of increament of lengths on account of suspending same weight will be: 9:1
```
2 years ago
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