Class XI Physics Unit, Dimensions and Errors 4

The percentage errors in quantities P, Q, R and S are 0.5%, 1%, 3% and 1.5% respectively in the measurement of a physical quantity
The maximum percentage error in the value of A will be :

In Vernier callipers, m divisions of main scale coincide with (m + 1) divisions of Vernier scale. If each division of main scale is d units, the least count of the instrument is

In a new system of units, the fundamental quantities mass, length and time are replaced by acceleration (a), density (ρ), and frequency (f). The dimensional formula for force in this system is

A student performs an experiment to determine the Young's modulus of a wire, exactly 2 m long, by Searle's method. In a particular reading, the student measures the extension in the length of the wire to be 0.8 mm with an uncertainty of ± 0.05 mm at a load of exactly 1.0 kg. The student also measures the diameter of the wire to be 0.4 mm with an uncertainty of ± 0.01 mm. Take g = 9.8 m/s² (exact). The Young's modulus obtained from the reading is

Vernier callipers has 20 divisions on its Vernier scale which coincide with 19 divisions on the main scale. Least count of the instrument is 0.1mm. The main scale division is

A student performs an experiment for determination of The error in length is Δ and in time T is ΔT and n is number of times the reading is taken. The measurement of g is most accurate for

A physical quantity A is dependent on other four physical quantities p, q, r and s as given below The percentage error of measurement in p, q, r and s are 1%, 3%, 0.5% and 0.33% respectively, then the maximum percentage error in A is