Units and Dimensions Weightage in JEE Main 2026
The expected Units and Dimensions Weightage in JEE Main 2026 is 2 to 3% which is equal to 3 to 4 marks in the exam. Check the year-wise weightage here for sub-topics along with sample questions.
Units and Dimensions Weightage in JEE Main 2026- Units and Dimensions is a fundamental topic in Physics that forms the basis of understanding the physical quantities implicated in the exam. Though it might not have a direct, dedicated weightage in JEE Main 2026 Physics exam, its concepts and applications are crucial for various other topics in Physics. As per the previous year's analysis, some of the topics considered important from Units and Dimensions are Mechanics, Electromagnetism, and Modern Physics. Units and Dimensions Weightage inJEE Main 2026is expected to be 2 to 3% which is equivalent to 3 to 4 marks in the exam. Candidates are asked a total of 35 to 45 questions in all JEE Main shifts, covering Units and Dimensions.
Units and Dimensions Weightage in JEE Mains require candidates to review the correctness of equations using dimensional analysis, and unit conversions where questions might require converting units from one system to another. Having a great understanding of the units enables candidates to identify errors in calculations.
To increase the spectrum of achieving 12/12 in this section, candidates need to carve a strongJEE Main 2026 Preparation Strategy. The concept of Units and Dimensions is incorporated into different JEE Mains Physics topics like Electromagnetism, Mechanics, and Modern Physics. In this article, we have discussed the Units and Dimensions Weightage in JEE Main 2026.
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What is the Units and Dimensions Weightage in JEE Main Physics?
Units and Dimensions are a fundamental concept in physics that deals with the measurement of physical quantities and the relationships between them. Some of the topics covered in this topic are -
- Mechanics: Work, Kinematics, Dynamics, Energy, Power, Momentum
- Electromagnetism: Electric Field, Electric Charge, Electric Potential, Electromagnetic Induction, Magnetic Field
- Modern Physics: Speed Of Light, Planck's Constant, Atomic Mass Unit.
Expected Units and Dimensions Weightage in JEE Main 2026
Candidates can check the expected Units and Dimensions Weightage in JEE Main 2026 Physics from the table below.
Particulars | Details |
Estimated weightage | 2% to 3% of the total physics marks |
Expected number of questions | 1 question |
Marks allocation | 3 to 4 marks (assuming each question is worth 4 marks) |
Units and Dimensions Subtopic Weightage in JEE Main 2026
Check the detailed Unit and Dimensions subtopic weightage for JEE Main 2026 in the table below:
Subtopic | Approximate Weightage (%) | Description |
Error Analysis | 10-15 | Calculation of measurement errors, percentage errors, and significant figures |
Dimensional Analysis | 25-30 | Finding dimensions, checking equation correctness using dimensions |
Vernier Calipers | 10-12 | Measurement techniques, least count determination, calculation problems |
Screw Gauge | 8-10 | Usage, pitch, least count, zero error handling, measurement problems |
Vectors | 15-18 | Representation, vector addition, subtraction, resolution |
Significant Figures | 5-7 |
Year-Wise Questions Asked in JEE Main Units And Dimension Weightage
Check the JEE Main Units and Dimension Weightage as per year wise for all sessions and shifts here -
Years | Total Number of Questions Asked in all Shifts |
2021 | 46 |
2022 | 38 |
2023 | 33 |
2024 | 30 |
| 2026 | 35 |
JEE Main Units & Dimension Subtopics Weightage
Check the weightage Units and Dimension Subtopics in the following table.Subtopics | Weightage |
Error Analysis | 10 |
Finding Dimensions and Dimensional Analysis | 15 |
Screw Gauge | 3 |
Vectors | 11 |
Vernier Calliper | 6 |
Significant Figures | 3Related Articles, |
Units and Dimensions Sample Questions
1. Which among the following is the Supplementary Unit——–
- Solid angle
- Mass
- Time
- Luminosity
Answer: (a) Solid angle
Explanation: Supplementary units are plane angles and solid angles. Other units mentioned are base units.
2. The symbol to represent “Amount of Substance” is ________
- K
- Cd
- A
- mol
Answer: (d) mol
Explanation: The symbol to represent the Amount of Substance is mol.
3. What is the unit of solid angle?
- Steradian
- second
- kilogram
- candela
Answer: (a) Steradian
Explanation: Steradian is the unit of solid angle.
4. AU is the unit of ________
- Astronomy Unit
- Astrological Unit
- Astronomical unit
- Archaeological Unit
Answer: (c) Astronomical unit
Explanation: The astronomical unit is the average distance of the Sun from the Earth. It is represented by the symbol AU.
5. Dimensions of kinetic energy is the same as that of ________
- Acceleration
- Velocity
- Work
- Force
Answer: (c) Work
Explanation: Dimensions of kinetic energy and work are the same.
6. Joule second is the unit of
- Force
- Angular momentum
- Energy
- Power
Answer: (b) Angular momentum
Explanation: Angular momentum is also known as rotational momentum. The total angular momentum of a closed system remains constant.
7. Electron volt is a unit of
- Luminosity
- Frequency
- Force
- Energy
Answer: (d) Energy
Explanation: One of the units of energy is electron volt.
8. Farad is the unit of ________
- Luminosity
- Wavelength
- Permittivity
- Inertia
Answer: (c) Permittivity
Explanation: Permittivity is the unit of Farad.
9. What is the system of unit
- SMS system
- MKP system
- FPS System
- CJS System
Answer: (c) FPS System
Explanation: The FPS System is one of the systems of units. Foot, Pound, and Second (FPS system).
10. The smallest value which is measured using an instrument is known as ________
- Absolute count
- Least count
- Round off value
- Minimum count
Answer: (b) Least count
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