Units and Dimensions Weightage in JEE Main 2025
The expected Units and Dimensions Weightage in JEE Main 2025 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 2025 - 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 weighatge in JEE Main 2025 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 in JEE Main is 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 strong JEE Main 2025 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 2025.
Check Also: JEE Main Previous Year Question Paper
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What is Units and Dimensions Weightage in JEE Main Physics?
Units and Dimensions is 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 2025
Candidates can check the expected Units and Dimensions Weightage in JEE Main 2025 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) |
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 |
2021 | 46 |
2022 | 38 |
2023 | 33 |
2024 | 1 question for each shift |
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, |
How Many Questions Are Asked from Units and Dimension? (Year Wise)
Candidates can check the weightage of the sub-topics asked from Units and Dimensions in JEE Mains previous years.
Subtopics | 2021 | 2022 | 2023 | Total |
Error Analysis | 11 | 8 | 5 | 24 |
Finding Dimensions and Dimension Analysis | 17 | 16 | 17 | 50 |
Vernier Caliper | 3 | 6 | 2 | 11 |
Vectors | 11 | 5 | 5 | 21 |
Screw Gauge | 3 | 2 | 1 | 6 |
Significant Figures | – | – | – | 0 |
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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FAQs
Is HC Verma enough for the JEE Main Physics preparation?
HC Verma is an important book for the JEE Main preparation as it comprises good explanations and many practice problems. But it is not enough to solely rely on it. Candidates are required to study NCERT textbooks as well.
Is the JEE Main syllabus reduced?
In the reduced syllabus of the JEE Mains exam, most topics have been removed from Chemistry with 6 units completely removed and around 20 topics removed from 5 other units.
Can candidates skip chapters in the JEE Main exam?
Though it's not wise to skip any topic for the JEE Main exam, however, if one is short on time, candidates can leave low-weightage topics and invest their time on the important topics.
Can candidates get admission into NIT with 92 percentile in JEE Main?
If the candidates are seeking to get admission into the top-listed IIITs, and NITs, then it will be difficult for them with such a percentile score. However, the reserved category candidates can try their luck to get admission into the IIITs or NITs with 92 percentile marks.
Which is the hardest chapter in JEE Main Physics exam?
The hardest topics in the JEE Main Physics exam comprise Heat and Thermodynamics, Electrostatics and Magnetism, Mechanics, Modern Physics, Current Electricity, Optics, and Electromagnetic Induction.
Are previous year question papers enough for the JEE Main exam?
No. Candidates should base their JEE Main exam preparation on the previous year's question papers, mock tests and practice tests to ace the JEE Main exam with high marks.
Is it easy to score 170 in the JEE Main exam?
170 marks in the JEE Main exam equals to 98.85+ percentile, which in itself is a very good percentile. Through this, candidates can secure admission into the top premier institutes in India such as NITs, IIITs, and GFTIs.
Which topics have more weightage in the JEE Main Physics paper?
In the JEE Main Physics paper, chapters with the most weightage are Electrostatics, Optics, Current Electricity, and Mechanics whereas the moderate weightage chapters comprise Magnetism, Modern Physics, Waves, and Thermodynamics.