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Most Repeated Questions in Physics Class 12 CBSE Board

Most Repeated Questions in Physics Class 12 CBSE Board

#CBSE Class 12th
Vishal kumarUpdated on 03 Jul 2025, 05:09 PM IST

As preparing for the CBSE Class 12 Physics examination appears to be difficult, it becomes simpler when focusing on repeated questions. Each year, there are often recurring questions or areas that are repeated in one or similar form. Such questions are usually asked several times from important chapters and concepts.

This Story also Contains

  1. Exam Pattern for CBSE Class 12 Physics Exam
  2. Repeated Questions from CBSE Class 12 Physics (2018-2023)
  3. How to Use CBSE Class 12 Most Repeated Questions?
Most Repeated Questions in Physics Class 12 CBSE Board
Most Repeated Questions in Physics Class 12 CBSE Board

As we know CBSE has already released the Class 12 Board 2025 Exam date sheet, hence it is important to focus on the important questions for better results. By doing them, you have the best clues as to what to expect in the exam and therefore increase your odds of scoring highly. In this article, we will discuss why repeated questions are useful, what types of questions are generally asked in the exam, and how you should approach them in order to secure a good score.

Exam Pattern for CBSE Class 12 Physics Exam

The CBSE Class 12 Physics exam is structured to assess students' understanding through a variety of question types, distributed across five sections:

  • Section A: 16 questions, including 12 multiple-choice questions (MCQs) and 4 assertion-reasoning questions, each worth 1 mark, totalling 16 marks.

  • Section B: 5 very short answer questions, each carrying 2 marks, summing up to 10 marks.

  • Section C: 7 short answer questions, each valued at 3 marks, amounting to 21 marks.

  • Section D: 2 case study-based questions, each worth 4 marks, totalling 8 marks.

  • Section E: 3 long answer questions, each carrying 5 marks, summing up to 15 marks.

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Repeated Questions from CBSE Class 12 Physics (2018-2023)

MCQs (1 Mark)

  1. What is the SI unit of electric flux? (Electrostatics)

  2. A point charge is placed at the centre of a cube. The flux through one face is:(Electrostatics)

  3. The drift velocity of electrons increases if:(Current Electricity)

  4. What is the unit of magnetic permeability in free space? (Magnetism)

  5. What happens to the resolving power of a microscope when wavelength decreases? (Optics)

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Short Answer Questions (SAQ, 2–3 Marks)

  1. Derive the formula for the equivalent resistance for resistors in parallel. (Current Electricity)

  2. Define wavefront. State Huygens' principle. (Wave Optics)

  3. Define electric dipole moment. Derive an expression for the electric field along the axial line. (Electrostatics)

  4. Explain the working of a potentiometer for measuring emf. (Current Electricity)

  5. State the laws of refraction. Explain Snell’s law. (Optics)

  6. What are coherent sources? Why are they essential for interference? (Wave Optics)

  7. State and derive Ohm’s law in terms of drift velocity. (Current Electricity)

  8. Write the relation between magnification, object distance, and image distance for a lens. (Optics)

  9. What is the photoelectric effect? Write Einstein’s equation. (Dual Nature of Matter)

  10. Explain the concept of rectification. Draw the circuit for a full-wave rectifier. (Semiconductors)

Long Answer Questions (LAQ, 5–6 Marks)

  1. Derive the lens maker's formula. (Optics)

  2. Explain the working of an AC generator. (Electromagnetic Induction)

  3. Using Biot-Savart law, derive the expression for the magnetic field at the centre of a circular current loop. (Magnetism)

  4. Derive an expression for energy stored in a parallel plate capacitor. (Electrostatics)

  5. Write the principle and workings of a transformer. Why is it not 100% efficient? (Electromagnetic Induction)

  6. Explain the Davisson-Germer experiment. Derive the expression for de Broglie wavelength. (Dual Nature of Matter)

  7. State and derive the equation for Young’s double-slit experiment. (Wave Optics)

  8. Derive an expression for the electric potential due to a dipole at an axial point. (Electrostatics)

  9. Derive the expression for the intensity in a diffraction pattern using single-slit diffraction. (Optics)

  10. Explain the working of a Zener diode as a voltage regulator. (Semiconductors)

Case-Based Questions (4–5 Marks)

  1. Topic: Current Electricity
    A potentiometer is used to measure the internal resistance of a cell. Questions focus on the formula, null point, and length effects.

  2. Topic: Optics
    A passage about the dispersion of light in a prism. Questions focus on Snell’s law, angular deviation, and refractive index.

  3. Topic: Magnetic Effects of Current
    Passage on a moving coil galvanometer. Questions focus on sensitivity, current sensitivity, and figures of merit.

Frequently Repeated Numerical Topics

  1. Capacitor Problems (Energy stored, series and parallel combinations).

  2. Resistor Networks (Equivalent resistance, power dissipation).

  3. Magnetic Field Calculations (Circular loop, solenoid).

  4. Young’s Double-Slit Experiment (Fringe width, path difference).

  5. Photoelectric Effect (Kinetic energy, stopping potential).

  6. Lens and Mirrors (Image distance, magnification).

  7. Nuclear Decay (Half-life, remaining atoms after decay).

How to Use CBSE Class 12 Most Repeated Questions?

  • Target Frequently Repeated Topics: Pay attention to chapters like Current Electricity, Electrostatics, Optics, Semiconductors, etc as these chapters are usually revisable for the coming year.

  • Solve Year-Specific Questions: Official CBSE question banks should be used for studying in order to get accurate practice.

  • Practice Case Studies: Do not forget to read NCERT to have context with case-study-based questions that you are going to attempt.

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Questions related to CBSE Class 12th

On Question asked by student community

Have a question related to CBSE Class 12th ?
how may marks should i get in my 12th board exams to get fee concesion in sastra university

Hello Aspirant,

SASTRA University commonly provides concessions and scholarships based on merit in class 12 board exams and JEE Main purposes with regard to board merit you need above 95% in PCM (or on aggregate) to get bigger concessions, usually if you scored 90% and above you may get partial concessions. I suppose the exact cut offs may change yearly on application rates too.

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G
gopi
4 Sep'25
Which course is best for computer science students after 12th standard

Hello,

After 12th, if you are interested in computer science, the best courses are:

  • B.Tech in Computer Science Engineering (CSE) – most popular choice.

  • BCA (Bachelor of Computer Applications) – good for software and IT jobs.

  • B.Sc. Computer Science / IT – good for higher studies and research.

  • B.Tech in Information Technology (IT) – focuses on IT and networking.

All these courses have good career scope. Choose based on your interest in coding, software, hardware, or IT field.

Hope it helps !

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P
Prachi Kumari
4 Sep'25
I am a CBSE class 12 private candidate will my maksheet of CBSE supplement exam will be delivered on main exam form address for supplementary exam form address ,my both addresses are different please tell

Hello Vanshika,

CBSE generally forwards the marksheet for the supplementary exam to the correspondence address as identified in the supplementary exam application form. It is not sent to the address indicated in the main exam form. Addresses that differ will use the supplementary exam address.

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G
gopi
3 Sep'25
I gave my 12th exam this year in which I got less marks. Then I gave improvement exam in which also I could not score full marks. So can I become a private candidate and appear for the exam again next year or not?

Hello

Yes, if you’re not satisfied with your marks even after the improvement exam, many education boards allow you to reappear as a private candidate next year to improve your scores. This means you can register independently, study at your own pace, and take the exams without attending regular classes. It’s a good option to improve your results and open up more opportunities for higher studies or careers. Just make sure to check the specific rules and deadlines of your education board so you don’t miss the registration window. Keep your focus, and you will do better next time.

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S
SEJAL JAIN
20 Aug'25
i gave improvement 2025 as the roll no is different from my previous year marksheet so will i get new migration certificate

Hello Aspirant,

Yes, in the case that you appeared for the 2025 improvement exam and your roll number is different from what was on the previous year’s marksheet, the board will usually release a new migration certificate. This is because the migration certificate will reflect the most recent exam details, roll number and passing year. You can apply to get it from your board using the process prescribed by them either online or through your school/college.

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G
gopi
12 Aug'25
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