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Units and Measurements

JEE Advanced · Physics · 39 past questions

32 of 39 · show all

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…
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…
Q3 2025 Paper 1

Figure 1 shows the configuration of main scale and Vernier scale before measurement. Fig. 2 shows the… (with a figure)
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…
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…
Q6 2024 Paper 1

A dimensionless quantity is constructed in terms of electronic charge $e$, permittivity of free space…
Q9 2023 Paper 2

Young's modulus of elasticity $Y$ is expressed in terms of three derived quantities, namely, the…
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)
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…
Q13 2020 Paper 1

Sometimes it is convenient to construct a system of units so that all quantities can be expressed in terms of…
Q14 2019 Paper 1

Let us consider a system of units in which mass and angular momentum are dimensionless. If length has…
Q17 2018 Paper 1

PARAGRAPH "A"…
Q19 2017 Paper 2

A person measures the depth of a well by measuring the time interval between dropping a stone and receiving…
Q20 2016 Paper 1

A length-scale ($l$) depends on the permittivity ($\varepsilon$) of a dielectric material, Boltzmann constant…
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)
Q22 2016 Paper 2

In an experiment to determine the acceleration due to gravity $g$, the formula used for the time period of a…
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…
Q24 2015 Paper 1

Planck's constant $h$, speed of light $c$ and gravitational constant $G$ are used to form a unit of length…
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…
Q26 2015 Paper 2

In terms of potential difference $V$, electric current $I$, permittivity $\varepsilon_0$, permeability…
Q27 2014 Paper 1

During Searle's experiment, zero of the Vernier scale lies between $3.20 \times 10^{-2}\,m$ and…
Q28 2014 Paper 1

To find the distance $d$ over which a signal can be seen clearly in foggy conditions, a railways engineer…
Q29 2013 Paper 1

The diameter of a cylinder is measured using a Vernier callipers with no zero error. It is found that the…
Q30 2013 Paper 2

Using the expression $2d \sin\theta = \lambda$, one calculates the values of $d$ by measuring the…
Q31 2013 Paper 2

Match List I with List II and select the correct answer using the codes given below the lists…
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…
Q33 2011 Paper 1

Paragraph for Question Nos. 38 and 39…
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…
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…
Q36 2010 Paper 1

A student uses a simple pendulum of exactly 1m length to determine g, the acceleration due to gravity. He…
Q38 2008 Paper 1

Students I, II and III perform an experiment for measuring the acceleration due to gravity ($g$) using a…
Q39 2007 Paper 1

Some physical quantities are given in Column I and some possible SI units in which these quantities may be…