A torque meter is calibrated to reference standards of mass, length and time each with 5 % accuracy.

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1.Units, Dimensions and Measurement

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A torque meter is calibrated to reference standards of mass, length and time each with $5 \%$ accuracy. After calibration, the measured torque with this torque meter will have net accuracy of$............\%$

A

$15$

B

$25$

C

$75$

D

$5$

(JEE MAIN-2022)

Solution

Dimensional formula for Torque

$[\tau]=\left[ ML ^{2} T ^{-2}\right]$

Now

Percentage error in torque $=\% \tau=\% M +2 \% L+2 \% T$

$\% \tau=25 \%$

Standard 11

Physics

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