Teaching HTET PGT Level 3 - 2024 Mock Test Physics Units, Dimensions and Measurements Accuracy, precision of instruments and errors in measurement
The dimensions of a physical quantity X is [Ma L−b T−c]. If the percentage errors in the measurement of M, L and T respectively are x%, y% and z%, the maximum percentage error in the measurement of X is -
1
(ax + by + cz)%
2
(ay + bx - cz)%
3
(az - bz + cy)%
4
(ax - by - cz)%