Question

Choose the correct answer.

1. 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%

Answer 1

Answer: (B)

25%

Answer 2

The correct option is(B): 25%

$|T|=[M^1L^2T^{-2}]$

$=\frac{△r}{r}=\frac{△M}{M}+2\frac{△L}{L}+2\frac{△T}{T}$

$=5×5\%=25\%$