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A steel wire of diameter 1 mm, and length 2 m is stretched by applying a force of 2.2 kg wt. the strain isA. `0.7xx10^(-4)`B. `1.4xx10^(-4)`C. `1.9xx10^(-5)`D. `2.8xx10^(-4)` |
Answer» Correct Answer - B `(l)/(L)=(F)/(Ay)=(2.2xx10)/(3.14xx0.25xx10^(-6)xx2xx10^(11))` `=(4.4)/(3.14)xx10^(-4)=1.4xx10^(-4)` |
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