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Q.

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 :

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a

75%

b

25%

c

5%

d

15%

answer is B.

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Detailed Solution

detailed_solution_thumbnail

Dimensional formula for Torque

[τ]=ML2T−2

Now

Percentage error in torque=%τ=%M+2%L+2%T

  % τ=25%

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