List of top Physics Questions on Units and measurement asked in NEET (UG)

The pitch of an error free screw gauge is 1 mm and there are 100 divisions on the circular scale. While measuring the diameter of a thick wire, the pitch scale reads 1 mm and 63^rd division on the circular scale coincides with the reference line. The diameter of the wire is:

The potential energy of a particle moving along the x-direction varies as:
\[ V = \frac{Ax^2}{\sqrt{x} + B} \]
The dimensions of \(\frac{A^2}{B}\) are:

A metal wire has mass (0.4±0.002)g, radius (0.3±0.001)mm and length (5±0.02)cm. The maximum possible percentage error in the measurement of density will nearly be:

The area of rectangular field (in m²) of length 55.3 m and breadth 25 m after rounding off the value for correct significant digits is:

Plane angle and solid angle have:

The errors in the measurement which arise due to unpredictable fluctuations in temperature and voltage supply are:

A screw gauge gives the following readings when used to measure the diameter of a wire Main scale reading : 0 mm Circular scale reading: 52 divisions Given that 1 mm on the main scale corresponds to 100 divisions on the circular scale. The diameter of the wire from the above data is

If E and G respectively denote energy and gravitational constant, then \(\frac{E}{G}\) has the dimensions

The angle of $1'$ (minute of arc) in radian is nearly equal to

A screw gauge has least count of 0.01 mm and there are 50 divisions in its circular scale. The pitch of the screw gauge is:

Dimensions of stress are:

A disc of radius \( 2 m\) and mass \(100 kg\) rolls on a horizontal floor. Its centre of mass has speed of \(20 cm/s.\) How much work is needed to stop it? 

The velocity v of a particle at time t is given by v = at + \(\bigg(\frac{b}{t}+c\bigg)\), where a, b and c are constants, The dimensions of a, b and c are respectively : constants, The dimensions of a, b and c are respectively :

The ratio of the dimensions of Planck's constant and that of the moment of inertia is the dimension of:

Percentage error in the measurement of mass and speed are $2\%$ and $3\%$ respectively. The error in the estimation of kinetic energy obtained by measuring mass and speed will be