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Physics - Units and Dimensions

Practise 6 IAT (IISER) previous year questions on Units and Dimensions, compiled from papers spanning 2019 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty IAT (IISER) tests.

Units and Dimensions has been asked in 5 of the 9 years of IAT (IISER) papers analysed (2017–2026), with 6 questions in all. 17% of them were easy, 83% moderate and 0% tough. Most of its questions came from 2023, with 2 questions that year. In the last three years (2023–2026) it had 3 questions across 3 papers, about 1 per paper.

All of the chapter's questions come from a single topic, Dimensions.

  1. 1The acceleration of a point particle is given by the equation where denotes position and denotes time. Which of the following relations show2026Dimensions
  2. 2Two fixed point particles, each of charge , are separated by a distance . Another point charge of mass is oscillating about its equilibrium 2023Dimensions
  3. 3A quantity has been measured to have a value of 0.00230 in some units. How many significant figures does the measured value have?2023Dimensions
  4. 4Which one of the following expressions has the dimension of electrical resistance where is the charge of an electron and is Planck's constan2021Dimensions
  5. 5The fundamental constants are given to be permittivity constant ( ), Planck's constant , velocity of light (c), Newton's constant and Boltzm2020Dimensions
  6. 6Which of the following is an expression for energy in terms of the Planck's constant , the velocity of light and the Gravitational constant 2019Dimensions

Frequently Asked Questions

1.How many questions are available for Units and Dimensions?

This chapter includes 6 questions compiled from IAT (IISER) papers spanning 2019 to 2026.

2.Are these questions only from IAT (IISER), or from other exams too?

These are IAT (IISER) questions specifically for the Units and Dimensions chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Units and Dimensions an important chapter for IAT (IISER) Physics?

Units and Dimensions has appeared in 5 of the 10 years of IAT (IISER) papers covered here, with 6 questions across 5 papers - about one per paper it appears in.

4.What is the difficulty level of Units and Dimensions questions in IAT (IISER)?

Of the 6 questions analysed for this chapter, 17% are easy, 83% moderate and 0% tough. 2023 had the most, with 2 questions.

5.Which topics in Units and Dimensions should I focus on?

All of this chapter's questions come from a single topic: Dimensions.

6.Is Units and Dimensions's weightage in IAT (IISER) going up or down?

Across all 5 papers analysed, Units and Dimensions has averaged about 1.2 questions per paper. In the last three years (2023–2026), that average has fallen, at about 1.0 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.