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Q. No.The length of a metallic wire is \(l_1,\) when the tension in it is \(T_1\) and is \(l_2\) when the tension is \(T_2.\) The original (natural) length of the wire is:
| 1. | \(\dfrac{l_1+l_2}{2}\) | 2. | \(\dfrac{T_2l_1+T_1l_2}{T_1+T_2}\) |
| 3. | \(\dfrac{T_2l_1-T_1l_2}{T_2-T_1}\) | 4. | \(\dfrac{T_1l_1-T_2l_2}{T_2-T_1}\) |
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Subtopic: Â Hooke's Law |
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