A) Increase by 1%
B) Increase by 0.5%
C) Decrease by 0.5%
D) Increase by 2%
Correct Answer: B
Solution :
\[T\propto \sqrt{l}\] Þ\[\frac{\Delta T}{T}=\frac{1}{2}\frac{\Delta l}{l}=\frac{1}{2}\times 1%=0.5%\]
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