A) 1.020
B) 0.020
C) 1.20
D) 0.20
Correct Answer: B
Solution :
\[n\,\,=\,\,\frac{1}{2\ell }\,\,\sqrt{\frac{T}{m}}\] \[n+5\,=\,\frac{1}{2\ell }\,\,\sqrt{\frac{T+\Delta T}{m}}\] \[\therefore \,\,\,\,\frac{n+5}{n}=\,\,\,\sqrt{\frac{T+\Delta T}{T}}\] \[\Rightarrow \,\,\,1+\frac{\Delta T}{T}\,=\,{{\left( 1+\frac{5}{n} \right)}^{2}}\,\,=\,\,1+\frac{10}{500}\] \[\Rightarrow \,\,\,\frac{\Delta T}{T}\,=\,\,\left( \frac{10}{500} \right)\,\,=\,\,0.020\]You need to login to perform this action.
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