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Two steel columns P (length L and yield strength fy = 250 MPa) and Q (length 2L and yield strength fy = 500 MPa) have the same cross-sections and end-conditions. The ratio of buckling load of column P to that of column Q is
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- 0.5
- 1.0
- 2.0
- 4.0
Correct Option: D
Buckling load,
| P = | (leff)2 |
| ∴ PP | PQ = | |||
| L2 | (2L)2 |
| ∴ | = 4 | PQ |
