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  • A torque metre is calibrated to reference standard with the mass, length and also with time, each will have 15% accuracy, after this calibration, measured torque with this torque meter, we wil

A torque metre is calibrated to reference standard with the mass, length and also with time, each will have 15% accuracy, after this calibration, measured torque with this torque meter, we will have net accuracy is

Option: 1

78%


Option: 2

76%


Option: 3

75%


Option: 4

80%


Answers (1)

best_answer

As torque

\begin{aligned} & =m L^2 T-2 \\ \frac{\Delta \tau}{\tau} & =\frac{\Delta m}{m}+ \frac{2 \Delta L}{L}+2 \frac{\Delta T}{T} \end{aligned} \\ \begin{aligned}\frac{\Delta \tau}{\tau}\times 100 =15+2 \times 15+2 \times 15 \\ =15+30+30 \\ =75 \% . \end{aligned}

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seema garhwal

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