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| 1. |
A force of \[{{10}^{3}}\] newton, stretches the length of a hanging wire by 1 millimetre. The force required to stretch a wire of same material and length but having four times the diameter by 1 millimetre is |
| A. | \[4\times {{10}^{3}}N\] |
| B. | \[16\times {{10}^{3}}N\] |
| C. | \[\frac{1}{4}\times {{10}^{3}}N\] |
| D. | \[\frac{1}{16}\times {{10}^{3}}N\] |
| Answer» C. \[\frac{1}{4}\times {{10}^{3}}N\] | |