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Units and Measurements

JEE Advanced · Physics · 39 past questions

  1. Q1 2026 Paper 2
    Two thin wires, Wire-1 of diameter 0.650 mm and Wire-2 of unknown diameter $d$ are given. To obtain the value…
  2. Q2 2026 Paper 2
    In a new system of units, the units of mass, length, time and current are 5 kg, 5 m, 5 s and 5 A…
  3. Q3 2025 Paper 1
    Figure 1 shows the configuration of main scale and Vernier scale before measurement. Fig. 2 shows the… (with a figure)
  4. Q4 2025 Paper 1
    Length, breadth and thickness of a strip having a uniform cross section are measured to be 10.5 cm, 0.05 mm…
  5. Q5 2025 Paper 2
    A temperature difference can generate e.m.f. in some materials. Let $S$ be the e.m.f. produced per unit…
  6. Q6 2024 Paper 1
    A dimensionless quantity is constructed in terms of electronic charge $e$, permittivity of free space…
  7. Q7 2024 Paper 2
    The dimensions of a cone are measured using a scale with a least count of 2 mm. The diameter of the base and…
  8. Q8 2023 Paper 1
    In an experiment for determination of the focal length of a thin convex lens, the distance of the object from…
  9. Q9 2023 Paper 2
    Young's modulus of elasticity $Y$ is expressed in terms of three derived quantities, namely, the…
  10. Q10 2022 Paper 2
    In a particular system of units, a physical quantity can be expressed in terms of the electric charge $e$…
  11. Q11 2021 Paper 1
    The smallest division on the main scale of a Vernier calipers is 0.1 cm. Ten divisions of the Vernier scale… (with a figure)
  12. Q12 2021 Paper 2
    A physical quantity $\vec{S}$ is defined as $\vec{S} = (\vec{E} \times \vec{B})/\mu_0$, where $\vec{E}$ is…
  13. Q13 2020 Paper 1
    Sometimes it is convenient to construct a system of units so that all quantities can be expressed in terms of…
  14. Q14 2019 Paper 1
    Let us consider a system of units in which mass and angular momentum are dimensionless. If length has…
  15. Q15 2018 Paper 1
    PARAGRAPH "X"…
  16. Q16 2018 Paper 1
    PARAGRAPH "X"…
  17. Q17 2018 Paper 1
    PARAGRAPH "A"…
  18. Q18 2018 Paper 1
    PARAGRAPH "A"…
  19. Q19 2017 Paper 2
    A person measures the depth of a well by measuring the time interval between dropping a stone and receiving…
  20. Q20 2016 Paper 1
    A length-scale ($l$) depends on the permittivity ($\varepsilon$) of a dielectric material, Boltzmann constant…
  21. Q21 2016 Paper 2
    There are two Vernier calipers both of which have 1 cm divided into 10 equal divisions on the main scale. The… (with a figure)
  22. Q22 2016 Paper 2
    In an experiment to determine the acceleration due to gravity $g$, the formula used for the time period of a…
  23. Q23 2015 Paper 1
    Consider a Vernier callipers in which each 1 cm on the main scale is divided into 8 equal divisions and a…
  24. Q24 2015 Paper 1
    Planck's constant $h$, speed of light $c$ and gravitational constant $G$ are used to form a unit of length…
  25. Q25 2015 Paper 2
    The energy of a system as a function of time $t$ is given as $E(t) = A^2\exp(-\alpha t)$, where…
  26. Q26 2015 Paper 2
    In terms of potential difference $V$, electric current $I$, permittivity $\varepsilon_0$, permeability…
  27. Q27 2014 Paper 1
    During Searle's experiment, zero of the Vernier scale lies between $3.20 \times 10^{-2}\,m$ and…
  28. Q28 2014 Paper 1
    To find the distance $d$ over which a signal can be seen clearly in foggy conditions, a railways engineer…
  29. Q29 2013 Paper 1
    The diameter of a cylinder is measured using a Vernier callipers with no zero error. It is found that the…
  30. Q30 2013 Paper 2
    Using the expression $2d \sin\theta = \lambda$, one calculates the values of $d$ by measuring the…
  31. Q31 2013 Paper 2
    Match List I with List II and select the correct answer using the codes given below the lists…
  32. Q32 2012 Paper 1
    In the determination of Young's modulus $\left(Y = \dfrac{4MLg}{\pi l d^2}\right)$ by using Searle's method…
  33. Q33 2011 Paper 1
    Paragraph for Question Nos. 38 and 39…
  34. Q34 2011 Paper 1
    Four point charges, each of +q, are rigidly fixed at the four corners of a square planar soap film of side…
  35. Q35 2011 Paper 2
    The density of a solid ball is to be determined in an experiment. The diameter of the ball is measured with a…
  36. Q36 2010 Paper 1
    A student uses a simple pendulum of exactly 1m length to determine g, the acceleration due to gravity. He…
  37. Q37 2010 Paper 2
    A Vernier calipers has 1 mm marks on the main scale. It has 20 equal divisions on the Vernier scale which…
  38. Q38 2008 Paper 1
    Students I, II and III perform an experiment for measuring the acceleration due to gravity ($g$) using a…
  39. Q39 2007 Paper 1
    Some physical quantities are given in Column I and some possible SI units in which these quantities may be…