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Physics - Units and Dimensions

Practise 33 AIIMS previous year questions on Units and Dimensions, compiled from papers spanning 2001 to 2019. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty AIIMS tests.

Units and Dimensions has been asked in 17 of the 19 years of AIIMS papers analysed (2001–2019), with 33 questions in all. 85% of them were easy, 12% moderate and 3% tough. Most of its questions came from 2001, with 5 questions that year. In the last three years (2017–2019) it had 5 questions across 5 papers, about 1 per paper.

The chapter's 2 topics are not weighted equally: Dimensions (27 questions, 82%) and Units (6 questions, 18%) have been asked the most. Dimensions has produced the most tough questions (1).

  1. 1What is the dimension of luminous flux?26 May, 2019Dimensions
  2. 2The only mechanical quantity which has negative dimension of mass is25 May, 2019Dimensions
  3. 3What are the dimensions of in the relation , where is the force, is distance and is time ?27 May, 2018Dimensions
  4. 4Suppose a quantity can be dimensionally represented in terms of and T, that is then26 May, 2018Dimensions
  5. 5Assertion : Power of a engine depends on mass, angular speed, torque and angular momentum, then the formula of power is not derived with the2017Dimensions
  6. 6If the units of length, mass and force are chosen as fundamental units, the dimensions of time would be2014Dimensions
  7. 7Dimensional formula of angular momentum is2013Dimensions
  8. 8Dimensional formula of , heat supplied to the system is given by2012Dimensions
  9. 9What is the dimensions of magnetic field in terms of (= coulomb), M, L, T?2011Dimensions
  10. 10If the energy, , where is the universal gravitational constant, is the Planck's constant and is the velocity of light, then the values of an2010Dimensions
  11. 11Which of the following pairs does not have same dimensions ?2010Dimensions
  12. 12The dimensions of specific resistance are2009Dimensions
  13. 13The dimensional formula of Planck's constant is2009Dimensions
  14. 14Assertion : The dimensional formula for product of resistance and conductance is same as for dielectric constant. Reason: Both have dimensio2009Dimensions
  15. 15In an electrical circuit containing \(L, C\) and \(R\) which of the following does not denote the dimensions of frequency?2008Dimensions
  16. 16Lumen is the unit of2008Units
  17. 17Assertion: In the relation \(f= {1}{2 l} { {T}{ }}\), where symbols have standard meaning, \( \) represent linear mass density. Reason : The2008Dimensions
  18. 18What is the dimensions of impedance ?2007Dimensions
  19. 19Which of the following physical quantities do not have same dimensions?2007Dimensions
  20. 20The magnetic moment has dimensions of2006Dimensions
  21. 21"Parsec" is the unit of2005Units
  22. 22Dimension of electrical resistance is2005Dimensions
  23. 23Assertion : Specific gravity of a fluid is a dimensionless quantity. Reason : It is the ratio of density of fluid to the density of water.2005Dimensions
  24. 24Using mass , length , time and current as fundamental quantities, the dimension of permittivity is2004Dimensions
  25. 25Using mass , length , time and current as fundamental quantities, the dimension of permeability is2003Dimensions
  26. 26Length cannot be measure by2002Units
  27. 27The dimension of torque is2002Dimensions
  28. 28Assertion : S.I. units are logical and coherent. Reason : S.I. system of units is a rationalised system.2002Units
  29. 29Speed in kilometer per hour in S.I. unit is represented as2001Units
  30. 30Dimension of resistivity is2001Dimensions
  31. 31Which of the following physical quantities do not have same dimensions?2001Dimensions
  32. 32S.I. unit of velocity is2001Units
  33. 33What is the dimensional formula for the gravitational constant ?2001Dimensions

Frequently Asked Questions

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

This chapter includes 33 questions compiled from AIIMS papers spanning 2001 to 2019.

2.Are these questions only from AIIMS, or from other exams too?

These are AIIMS questions specifically for the Units and Dimensions chapter. Questions from other exams like NEET or JIPMER are organised separately under their respective exam sections.

3.Is Units and Dimensions an important chapter for AIIMS Physics?

Units and Dimensions has appeared in 17 of the 19 years of AIIMS papers covered here, with 33 questions across 19 papers - about 2 per paper it appears in.

4.What is the difficulty level of Units and Dimensions questions in AIIMS?

Of the 33 questions analysed for this chapter, 85% are easy, 12% moderate and 3% tough. 2001 had the most, with 5 questions.

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

These topics have carried the most weightage in Units and Dimensions:

  • Dimensions - 27 questions (82%)
  • Units - 6 questions (18%)
  • Dimensions has produced the most tough questions (1).
6.Is Units and Dimensions's weightage in AIIMS going up or down?

Across all 19 papers analysed, Units and Dimensions has averaged about 1.7 questions per paper. In the last three years (2017–2019), 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.