CBSE 12th Physics Practical Viva Questions With Answers

CBSE 12th physics practical viva questions involves 2 experiments and carries 30 marks. The viva voce is conducted on the basis of the experiments. The syllabus for Physics practical exam along with the marks distribution and sample question papers can be found in this article.

CBSE 12th Physics practical question papers 2025 are an essential tool for the students to excel in the upcoming CBSE class 12th exams 2025. The students must practise the sample question papers to get an idea about what may come in the board examination. Check here more on CBSE 12th physics practical viva questions.

CBSE 12th Physics Practical Sample Question Papers PDF 2025

The sample PDFs for CBSE 12th physics practical viva questions 2025 can be found below:

Also Check: CBSE Class 12 Question Bank - All Subjects PDF Download

CBSE 12th Physics Practical Question Papers 2025: Marks Distribution

The marks distribution for CBSE class 12 Physics examination has been shared in the table below:

Also Check: CBSE Maths Marks Distribution for Class 12 2025

CBSE 12th Physics Practical Question Papers 2025: Experiment Topics

The topics for experiments in sections A and B have been shared in this section. Students appearing for the board examination in the session 2025, can form an idea of the topics of experiment in both the sections.

Experiment Topics in Section A

1. Finding the resistance of a wire through a metre bridge and determining the resistivity or specific resistance of the material.
2. Determining the resistance per centimetre of a wire by plotting the graph for current and potential difference.
3. Verifying the laws of series combination of resistances with the use of a metre bridge.
4. Comparing the EMF of two primary cells with the use of a potentiometer.
5. Verifying the laws of parallel combination of resistances with the use of metre bridge.
6. Determining the internal resistance of a primary cell with the use of a potentiometer.
7. Finding the frequency of the AC mains using a sonometer.
8. Converting the galvanometer of a known resistance and a figure of merit into voltmeter of a certain range and verification of the same.
9. Determining the resistance of the galvanometer using the method of half-deflection and finding its figure of merit.
10. Converting the galvanometer of a certain given resistance and a figure of merit into into ammeter of a certain range and verifying it.

Also Check: CBSE Class 12th Physics Syllabus 2025: Download PDF

Experiment Topics in Section B

1. Finding the v-value for different u-values for a concave mirror and finding the focal length.
2. Finding the focal length of a convex mirror with the use of a convex lens.
3. Finding the focal length of a convex lens through plotting of graphs between -values  and v-values.
4. Finding the focal length of a concave lens with the use of a convex lens.
5. Determining the minimum deviation angle for a prism by the plotting of a graph between the angle of deviation and the angle of incidence.
6. Determining the refractive index of glass with the use of a travelling microscope.
7. Finding the refractive index of any given liquid through a convex lens and plane mirror.
8. Drawing I-V graph for p-n junction in forward and reverse bias.
9. Drawing the curve of the Zener diode.
10. Determining the wavelength of the laser beam by the method of diffraction.

Also Check: CBSE Class 12th Physics Question Paper

CBSE 12th Physics Practical Question Papers 2025: Prescribed Books

The books that are officially prescribed for CBSE class 12 Physics practical are:

1. Physics Class XI, (Part I and II) - NCERT
2. Physics Class XII, (Part I and II) - NCERT
3. Laboratory Manual of Physics for Class XII - NCERT

Also Check: CBSE Class 12 Maths Question Paper 2024

CBSE 12th Physics Practical Question Papers 2025: Preparation Tips

Students are advised to follow the below mentioned tips while preparing for the Chemistry practical exam 2025:

• Practising the experiments

It is important to keep practising the experiments because there are several minute details to be taken care of while performing the experiments. Practising on a regular basis will only enhance the speed and accuracy of the results of the experiment.

• Understanding the experiment

The experiments must be understood clearly before practising. The procedures must be understood well.

• Practical Record Book

All the experiments must be noted down well in the practical record book. The procedures, observations and inferences must be written in a step-by-step manner.

• Viva Voce

The viva voce will be conducted on the basis of the experiments performed. Therefore it is important to know the concepts thoroughly.

• Investigatory project

The topic selection for the investigatory project must be done carefully. The observations must be charted down.

• Revision

It is very important to know and remember the topics very well. Therefore revising the topics on a regular basis is very helpful.

• Managing time

Time management skills must be honed. It is important to set the time that can be dedicated to each experiment before starting with the same.