Embibe Experts Solutions for Chapter: Physical World and Measurement, Exercise 9: Exercise (Previous Year Questions)

Dimensional formula of angular velocity is-

Which of the following pairs does not have similar dimensions?

Dimensions of relative density is :

The external and internal radius of a hollow cylinder are measured to be $\left(4.23\pm 0.01\right) \mathrm{cm}$ and $\left(3.89\pm 0.01\right) \mathrm{cm}$. The thickness of the wall of the cylinder is

Percentage error in measuring the radius and mass of a solid sphere are $2\%$ and $1\%$ respectively. Then error in measurement of moment of inertia about to its diameter is

The pressure on a square plate is measured by measuring the force on the plate and the length of the sides of the plate. If the maximum error in the measurement of force and length are respectively $4\%$ and $2\%$, The maximum error in the measurement of pressure is
 

The error in measuring the side of a cube is $\pm 1\%$. The error in the calculation of the volume of the cube will be about

The dimensions of ${\left({\mu }_0{\in }_0\right)}^{-\frac{1}{2}}$ are,