List of top Physics Questions on Accuracy, precision of instruments and errors in measurement

Least count of vernier calipers is 0.01 cm. Measuring the length of an object reading of main scale is 2.7 cm and the fifth division of vernier scale coincide with any division of main scale. The length of object will be
In an experiment, the percentage of error occurred in the measurement of physical quantities A, B, C and Dare \(1\%, 2\%, 3\%\) and\( 4\%\) respectively. Then the maximum percentage of error in the measurement \(X\), where \(X =\frac{A^2B^{1/2}}{C^{1/3}D^3}\) will be:
In an experiment four quantities a, b, c and d are measured with percentage error 1%, 2%, 3% and 4% respectively. Quantity P is calculated as follows: P= $\frac{a^3 b^2}{cd}$ % error in P is