BITSAT 2025: Most Important Physics Topics and Questions

Mastering in Physics of BITSAT 2025 requires strategic focus on high-weightage topics. Key areas include Mechanics, Electrostatics & Magnetism, Heat & Thermodynamics, Optics, and Modern Physics. Also review Oscillations & Waves, Current Electricity, and Electronic Devices.

Approximately 20-25% of the Physics questions come from the Mechanics section, with a strong focus on Laws of Motion, Work and Energy, and Rotational Motion.

From Electricity and Magnetism, topics like Coulomb's Law, Electric Field, Gauss's Law, Capacitance, Magnetic Effect of Current, Ampere's Law, and Lorentz Force collectively account for 20-27% of the questions.

The Heat and Thermodynamics chapter, specifically Kinetic theory and the laws of thermodynamics, covers roughly 10-12% of the exam paper.

Optics, including questions on lenses, mirrors, interference, and diffraction, make up about 8-10% of the paper.

Lastly, Modern Physics topics such as the photoelectric effect, atomic models, and radioactivity carry a 12-15% weightage.

Additionally, students should not overlook topics like Oscillations and Waves, Ohm's Law, Kirchhoff's Laws in current electricity, semiconductors, and logic gates in electronic devices.

BITSAT Physics 2025: Key Topics by Weightage

To maximize your BITSAT Physics score, focus on these topics, as they've historically carried higher weightage:

Very High Weightage Topics:

• Mechanics (Kinematics, Newton's Laws, Work, Power & Energy, Rotational Motion, Gravitation, etc.): Collectively, this section accounts for approximately 20% of the questions.
• Magnetic Effect of Current & Magnetism: Expect around 9-10% of the questions from this area.
• Electrostatics: This topic typically makes up 8-9% of the exam.
• Heat & Thermodynamics: Roughly 10% of the paper will cover this section.
• Current Electricity: About 6-8% of the questions will be about current electricity.

High Weightage Topics:

• Modern Physics (Atomic, Nuclear): This segment contributes 6-7% of the questions.
• Optics (Ray Optics & Wave Optics combined): Expect 4-6% of the paper to be on optics.
• Waves and Sound (including Wave Motion): This section covers 5-6% of the questions.
• Simple Harmonic Motion (SHM): SHM usually accounts for 5-6% of the paper.
• Fluid Mechanics/Properties of Matter and Fluids: This topic typically carries 5-6% weightage.

Moderate Weightage Topics:

• Rotational Motion: Specifically, this can appear as 4-5% of the paper.
• Work, Power & Energy: This individual topic is about 4%.
• Elasticity: Expect 3-4% of the questions from elasticity.
• Gravitation: This topic also accounts for 3-4%.
• Units, Dimensions, and Errors: This foundational topic usually contributes 2-4%.
• Alternating Current (AC): This section typically has a 2-3% weightage.

BITSAT Physics 2025: Most Expected Questions

Here are 10 highly anticipated questions for the BITSAT Physics 2025 exam:

1. Work done to double the radius R of a soap bubble (surface tension T) under isothermal conditions:

a) 32(Pie)R2T

b) 24(Pie)R2T

c) 8(Pie)R2T

d) 4(Pie)R2T

      2. Height of water rise in a capillary tube when its cross-sectional area is reduced to one-fourth (initial rise 20 cm):

(a) 10 cm

(b) 20 cm

(c) 40 cm

(d) 80 cm

3. Depth (h) of a lake if pressure at half depth is 2/3 of pressure at bottom (Po is atmospheric pressure at surface):

(a) 10 m

(b) 20 m

(c) 60 m

(d) 30 m

4. Coefficient of volume expansion for an ideal gas expanding such that pT2=constant:

(A) 1/T

(B) 2/T

(C) 3/T

(D) 4/T

5. Distance traveled by a sphere (mass m, radius r, speed v) in gravity-free space before stopping, given viscosity 1/6(Pie):

(A) mv/2r

(B) 2mv/r

(C) mv/r

(D) mv/4r

6. Number of possible natural oscillations below 1000 Hz for an 83 cm pipe closed at one end (sound speed 332 m/s):

(A) 3

(B) 4

(C) 5

(D) 6

7. Ratio y=CP /CV for an ideal gas in an adiabatic process where pressure is proportional to the cube of its temperature:

a) 3/5

b) 4/3

c) 5/3

d) 3/2

      8. Maximum current measurable by an ammeter formed by a 50 Ohm galvanometer (10 mA full-scale) with a 1 Ohm shunt:

(a) 500 mA

(b) 510 mA

(c) 610 mA

(d) 490 mA

9. Equivalent resistance between two ends of the given circuit (image implied):

(a) r

(b) r/6

(c) r/3

(d) r/9

10. Coefficient of static friction when a 2 kg brick slides on a surface inclined at 45 degrees:

A) 1

B) 1.7

C) 0.5

D) 1/3

Read More:

• BITSAT Login 2025 Active
• BITSAT Syllabus 2025
• BITSAT Exam Pattern 2025
• BITSAT 2024 Question Paper
• BITSAT 2023 Question Paper

Frequently Asked Questions

How many BITSAT 2025 questions are asked in the Physics section? +

Ans: The Physics section usually has 30 questions.

Is NCERT sufficient for BITSAT 2025 Physics preparation? +

Ans: NCERT is a good foundation, but for BITSAT's speed and application-based questions, additional practice from standard reference books is recommended.

How can I improve my score in BITSAT 2025 Physics? +

Ans: Focus on conceptual clarity, regular practice of problems (especially numericals), memorizing formulas, and consistent mock test attempts to improve speed and accuracy.

Are there any "easy scoring" topics in BITSAT 2025 Physics? +

Ans: While "easy" is subjective, topics like Units & Dimensions, Simple Harmonic Motion, and basic current electricity concepts can often be quicker to solve if fundamentals are clear.

Should I prioritize 11th or 12th standard Physics topics for BITSAT 2025? +

Ans: BITSAT covers both the 11th and 12th standard syllabus. High weightage topics are distributed across both, so a balanced preparation is crucial.

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