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CBSE Class 12 Physics Viva Questions with Answers 2025

CBSE Class 12 Physics Viva Questions with Answers 2025

#CBSE Class 12th
Vishal kumarUpdated on 18 Jul 2025, 03:06 AM IST

The CBSE Class 12 viva is one of the practical exams, with most of the questions being asked based on experiments and concepts learnt by the students. Preparation is key to ensure that a clear and concise explanation can be delivered confidently. The CBSE Class 12 board exams are among the top examinations for students. CBSE has already declared the date-sheet for Class 12 2026, thereby the students are aware of the exams scheduled and they can schedule their preparation accordingly. Besides, CBSE will also release the Class 12 Sample Papers 2025-26, which will assist students in identifying the kind of questions and marking scheme for the CBSE Class 12 practical exams 2026. The following article highlights CBSE Class 12 Physics Viva Questions with Answers for the year 2025-26.

This Story also Contains

  1. Download CBSE Class 12 Physics Viva Questions with Answers 2026
  2. Some Important CBSE Class 12 Viva Questions for Physics
  3. Tips to Prepare for CBSE Class 12 Physics Viva 2026
CBSE Class 12 Physics Viva Questions with Answers 2025
CBSE Class 12 Physics Viva Questions with Answers 2026

Download CBSE Class 12 Physics Viva Questions with Answers 2026

More than 100 questions with answers for CBSE Physics viva are given in the PDF. These questions will help students to prepare well for the viva. Also, make sure to complete your record and get it checked before the viva. Click on the link below to download the complete Viva question with answers.

Download PDF - CBSE Class 12 Physics Viva Questions with Answers 2025-26

Some Important CBSE Class 12 Viva Questions for Physics

Students can go through the following viva questions for CBSE Class 12 physics. These questions will help students to prepare well and score better in the viva.

Q1. Define electric potential. How does it differ from an electric field?
Ans. Electric potential at a point is the work done per unit charge in bringing a positive test charge from infinity to that point. Electric field relates to force on a charge; potential relates to energy/work.

Q2. Explain the concept of capacitance. What is its SI unit?
Ans. Capacitance is the ability of a system to store electric charge per unit potential difference. SI unit: Farad (F).

Q3. State Ohm’s law. Under what conditions is it not valid?
Ans. Ohm’s law: V=IR. It may fail for devices that do not have a constant ratio of V/I (e.g., diodes) or under conditions like high temperature (where material properties change).

Q4. Why is a voltmeter connected in parallel and an ammeter in series?
Ans.

  • Voltmeter in parallel: To measure potential difference without significantly altering the circuit current (it has high resistance).
  • Ammeter in series: So full current passes through it (it has low resistance).

Q5. In a meter bridge experiment, why should the wire be of uniform cross-section and material?
Ans. To maintain a constant resistance per unit length, ensuring accurate measurement of the balance point.

Tips to Prepare for CBSE Class 12 Physics Viva 2026

Go through the following tips and create a strategic study plan to score better in the CBSE Class 12 Physics viva.

  • Familiarize yourself with the basic concepts of Physics. Viva questions are normally asked about the fundamental concepts. Refresh core topics such as Ohm’s law, optics, and electromagnetism, completely.
  • Avoid explaining any of the experiments you never performed during your practical sessions. Learn about all the Procedures, the equipment, and the principles of experiments that you have performed.
  • Always try to answer the questions in a brief and concise form. Do not over-explain the answer. Always review the practical notebook, as it is often reviewed during the viva exam.
  • Ensure you have a clear idea of the observations and calculations related to each experiment that you have performed. Check out the viva questions in the CBSE model papers. They provide a good concept of what the real examination is going to contain.
  • Try to learn the practical implementations of the concepts used in the experiments. The students should try giving the mock test with the help of classmates or teachers.
  • Learn the uses of various common formulas often used in calculations. Students should be aware of the SI units and their conversions. It is important to closely listen to the examiner’s question before giving the answers. Also, make sure to have your practical notebook well organized and checked before the final viva.
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Frequently Asked Questions (FAQs)

Q: What are the maximum marks for the CBSE exam?
A:

The CBSE Exam for each subject is for 100 marks. The theory exam consists of 70 marks, and the practical exam consists of 30 marks.

Q: What are the Viva questions asked in Physics class 12?
A:

They are normally derived from the experiments you conduct in the lab, the principles behind them, and simple Physics. For more details, check the questions provided in the above article.

Q: How are practical marks given in the CBSE Class 12 exams?
A:

Practical marks are awarded based on the practical that the student has performed, the viva performance, and the practical notebook.

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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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