JEE Main Physics question
A uniform wire, fixed at its upper end, hangs vertically and supports a weight at its lower end. If its radius is , length and the Young's modulus for the material of the wire is , the extension is
1. directly proportional to 2. inversely proportional to 3. directly proportional to
Answer: (A)
Solution
Extension . This is directly proportional to (statement 3, true), but it is inversely proportional to , not
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