CBSE Class 12 Physics Viva Questions with Answers 2025

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.