CBSE Class 12 Physics Viva Questions with Answers 2025

The CBSE Class 12 board exams are among the top examinations for students. CBSE has already declared the date-sheet for 2025 Class 12, thereby the students are aware of the exams scheduled and they can schedule their preparation accordingly. Besides, CBSE has also issued the Class 12 Sample Papers 2024-25 which assist students in identifying the kind of questions and marking scheme for the CBSE Class 12 practical exams 2025.

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The following article highlights CBSE Class 12 Physics Viva Questions with Answers for the year 2025. The 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.

Below, the most typical viva questions are provided with answers and useful information on how to succeed in the Physics practicals.

Download CBSE Class 12 Physics Viva Questions with Answers 2025

More than 100 questions with answers for CBSE Physics viva are given in the PDF. click on the given link below to download the complete viva question with answer.

Q1. Define electric potential. How does it differ from 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.

These are some of the sample questions for CBSE class 12 physics viva download the PDF by clicking on the link below for complete viva questions with answers.

Download PDF - CBSE Class 12 Physics Viva Questions with Answers 2025: Top Physics Practical Viva Solutions PDF Download

Tips to Prepare for Physics Viva Questions for Class 12

• Familiarize yourself with the basic concepts of Physics. Viva questions are normally asked from 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 brief and concise form. Do not over-explain the answer.
• Always review the practical notebook, 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 with the help of classmates or teachers.
• Learn the uses of various common formulas often used in calculation.
• Students should be aware of the S.I. Units and their conversations.
• It is important to closely listen to the examiner’s question before giving the answers.
• It is good to have your practical notebook well organized and checked before the final viva.