A rigid bar of mass \(M\) is supported symmetrically by three wires each of length \(l\). Those at each end are of copper and the middle one is of iron. The ratio of their diameters, if each is to have the same tension, is equal to:
1. | \(\dfrac{Y_{\text{copper}}}{ Y_{\text{iron}}}\) | 2. | \({\sqrt{\dfrac{Y_{\text{iron}}}{Y_{\text{copper}}}}}\) |
3. | \({\dfrac{Y^{2}_{\text{iron}}}{Y^{2}_{\text{copper}}}}\) | 4. | \({\dfrac{Y_{\text{iron}}}{Y_{\text{copper}}}}\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology(a) | the same stress | (b) | different stress |
(c) | the same strain | (d) | different strain |
1. | (a), (b) | 2. | (a), (d) |
3. | (b), (c) | 4. | (c), (d) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology