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JEE Advanced Units and Measurements questions with solutions

Dimensional analysis, significant figures, errors and measuring instruments. 8 questions from our 2016–2025 JEE Advanced pattern papers, from the Class 11 Physics syllabus. Each has the answer and a full solution.

Also practise: Units and Measurements for JEE Main

JEE Advanced 2025

The density of a solid metal cylinder is to be found. Its mass is measured as 8.42 g with a balance of least count 0.01 g. Its diameter is measured…JEE Advanced 2025 Paper 2 · medium

JEE Advanced 2021

The resistivity of a wire is found from ρ=(π d^2V)/(4IL). The measurements are: potential difference V=5.00 V with least count 0.05 V, current I=0.50…JEE Advanced 2021 Paper 1 · easy
In a simple-pendulum experiment to find g, the length L is measured as 100.0 cm with a metre scale of least count 0.1 cm, and the time for 20…JEE Advanced 2021 Paper 2 · easy

JEE Advanced 2020

In an experiment to find the Young's modulus of a wire using Y=(4FL)/(π d^2 l), the following readings are taken: load F=10.0 N measured with least…JEE Advanced 2020 Paper 1 · easy
In an experiment on a simple pendulum, the string length from the suspension point to the top of the bob is measured as 90.0 cm with a metre scale of…JEE Advanced 2020 Paper 2 · medium

JEE Advanced 2019

In an experiment to find g with a simple pendulum, the length is measured as L=100.0±0.1 cm and the time for 20 oscillations as 40.0±0.2 s. Use…JEE Advanced 2019 Paper 1 · medium

JEE Advanced 2017

The resistivity of a wire is found from ρ=(π d^2V)/(4IL). The voltmeter reads V=2.00±0.02 V and the ammeter I=0.50±0.01 A. The length is L=50.0±0.5…JEE Advanced 2017 Paper 1 · easy

JEE Advanced 2016

In an experiment to find g with a simple pendulum, the length of the thread is measured as 96.0 cm with a possible error of 0.4 cm and the diameter…JEE Advanced 2016 Paper 1 · medium

Other Physics topics

Atoms, Nuclei and Dual Nature of Radiation 35 Calorimetry and Heat Transfer 17 Capacitors 11 Current Electricity 13 Electromagnetic Induction and Alternating Current 25 Electrostatics 15 Fluid Mechanics, Elasticity and Surface Tension 21 Gravitation 13 Kinematics and Laws of Motion 11 Magnetic Effects of Current 34 Ray and Wave Optics 21 Rotational Motion 31 Simple Harmonic Motion 15 Thermodynamics and Kinetic Theory of Gases 23 Waves and Sound 28 Work, Energy and Power 9