NEET Units and Measurements PYQ practice sheet

16 previous-year NEET Physics questions from Units and Measurements, newest papers first. Units and Measurements carries 22 of the Physics questions in NEET 2020 to 2026, so this is a good place to test yourself after revising the chapter. Marking: +4 correct, −1 wrong.

1. 1.

   RE-NEET 2026

   One main scale division of a Vernier calliper is equal to $1$ mm and the number of divisions on the Vernier scale is $10$. When both the jaws touch each other, the Vernier scale shifts to the left of zero of the main scale in such a way that $4^{th}$ Vernier division coincides with a division of the main scale. If this Vernier calliper measures the length of the wire to be $1$ cm, the actual length of the wire is :

   • (A)
     $0.96\ \mathrm{cm}$
   • (B)
     $1.00\ \mathrm{cm}$
   • (C)
     $1.04\ \mathrm{cm}$
   • (D)
     $0.60\ \mathrm{cm}$
2. 2.

   RE-NEET 2026

   Consider that $\sigma_s$, $k_B$, $b$ represents Stefan-Boltzmann constant, Boltzmann constant and Wien's displacement law constant, respectively. The dimension of $\sigma_s k_B^{-1} b$ is

   • (A)
     $[L^{-1}T^{-1}K^{-4}]$
   • (B)
     $[L^{-1}T^{-1}K^{-3}]$
   • (C)
     $[L^{-1}T^{-1}K^{-2}]$
   • (D)
     $[L^{-1}K^{-2}]$
3. 3.

   NEET 2026

   The speed of light in vacuum is taken as unity. If light takes 6 min 40 s to reach the Earth from the Sun, the distance between the Sun and the Earth in new unit is:

   • (A)
     $3\times10^{10}$
   • (B)
     $3\times10^{8}$
   • (C)
     500
   • (D)
     400
4. 4.

   NEET 2026

   Each side of a metallic cube of mass 5.580 kg is measured to be 9.0 cm. Keeping the significant figures in view, the density of the material of the cube can be best expressed as $X\times10^{3}\ \text{kg m}^{-3}$ where the value of $X$ is:

   • (A)
     7.65
   • (B)
     7.6
   • (C)
     7.654
   • (D)
     7.7
5. 5.

   NEET 2026

   In a vernier calliper, 20 VSD coincide with 16 MSD (each division of length 1 mm). The least count of the vernier callipers is:

   • (A)
     0.02 cm
   • (B)
     0.1 cm
   • (C)
     0.01 cm
   • (D)
     0.2 cm
6. 6.

   NEET 2024

   In a vernier calipers, $(N+1)$ divisions of vernier scale coincide with $N$ divisions of main scale. If 1 MSD represents 0.1 mm, the vernier constant (in cm) is:

   • (A)
     $100N$
   • (B)
     $\dfrac{1}{100(N+1)}$
   • (C)
     $\dfrac{1}{10N}$
   • (D)
     $10(N+1)$
7. 7.

   NEET 2024

   The quantities which have the same dimensions as those of solid angle are:

   • (A)
     angular speed and stress
   • (B)
     strain and angle
   • (C)
     strain and arc
   • (D)
     stress and angle
8. 8.

   NEET 2024

   A force defined by $F=\alpha t^2+\beta t$ acts on a particle at a given time $t$. The factor which is dimensionless, if $\alpha$ and $\beta$ are constants, is:

   • (A)
     $\dfrac{\alpha\beta}{t}$
   • (B)
     $\dfrac{\beta t}{\alpha}$
   • (C)
     $\dfrac{\alpha t}{\beta}$
   • (D)
     $\alpha\beta t$
9. 9.

   NEET 2023

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

   • (A)
     Random errors
   • (B)
     Instrumental errors
   • (C)
     Personal errors
   • (D)
     Least count errors
10. 10.

    NEET 2023

    A metal wire has mass $(0.4\pm0.002)\ \mathrm{g}$, radius $(0.3\pm0.001)\ \mathrm{mm}$ and length $(5\pm0.02)\ \mathrm{cm}$. The maximum possible percentage error in the measurement of density will nearly be:

    • (A)
      1.4%
    • (B)
      1.2%
    • (C)
      1.3%
    • (D)
      1.6%
11. 11.

    NEET 2022

    The area of a rectangular field (in $\text{m}^2$) of length 55.3 m and breadth 25 m, after rounding off the value for correct significant digits, is:

    • (A)
      $14\times10^{2}$
    • (B)
      $138\times10^{1}$
    • (C)
      1382
    • (D)
      1382.5
12. 12.

    NEET 2021

    If force $[F]$, acceleration $[A]$ and time $[T]$ are chosen as the fundamental physical quantities. Find the dimensions of energy.

    • (A)
      $[F][A][T]$
    • (B)
      $[F][A^{-1}][T]$
    • (C)
      $[F][A][T^{2}]$
    • (D)
      $[F][A][T^{-1}]$
13. 13.

    NEET 2021

    If $E$ and $G$ respectively denote energy and gravitational constant, then $\dfrac{E}{G}$ has the dimensions of :

    • (A)
      $[M^{2}][L^{-1}][T^{0}]$
    • (B)
      $[M^{2}][L^{-2}][T^{-1}]$
    • (C)
      $[M][L^{-1}][T^{-1}]$
    • (D)
      $[M][L^{0}][T^{0}]$
14. 14.

    NEET 2021

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

    • (A)
      $0.052\ \mathrm{cm}$
    • (B)
      $0.26\ \mathrm{cm}$
    • (C)
      $0.026\ \mathrm{cm}$
    • (D)
      $0.52\ \mathrm{cm}$
15. 15.

    NEET 2020

    Taking into account the significant figures, what is the value of $9.99\ \mathrm{m} - 0.0099\ \mathrm{m}$ ?

    • (A)
      9.9801 m
    • (B)
      9.98 m
    • (C)
      9.980 m
    • (D)
      9.9 m
16. 16.

    NEET 2020

    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 :

    • (A)
      0.01 mm
    • (B)
      0.25 mm
    • (C)
      0.5 mm
    • (D)
      1.0 mm