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which of the following is the most precise instrument for measuring the length

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The most precise instrument for measuring length is screw gauge.

\begin{array}{l} \text { Least count of screw gauge }=\frac{\text { Pitch }}{\text { No. of divisors on circular scale }} \\ \qquad \begin{aligned} =\frac{1.00 \mathrm{mm}}{100}=& \frac{1}{1000} \mathrm{cm} \\ &=0.001 \mathrm{cm} \end{aligned} \\ \begin{aligned} & \end{aligned} \\ \qquad \begin{aligned} & \end{aligned} \end{array}

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Satyajeet Kumar

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