CBSE Practical Exams Preparation 2023: Check Physics Class 12th Viva Questions

CBSE Practical Exams Preparation 2023: The Class 12 CBSE Viva test is vital to score high marks in the CBSE Board exam 2023. Keeping in mind the numerous exams/test Class 12 students have to prepare for, we have accumulated a few CBSE Practical Exams Preparation 2023 tips to help students to sail smoothly during the CBSE Practical Exam 2023.

The Practical exams will commence on Jan 1, 2023. However, authorities are yet to release the CBSE 10th 12th date sheet 2023.

Also Read: CBSE Practical Exams Preparation 2023 - Check Business Studies Class 12th Viva Questions

CBSE Practical Exams Preparation 2023 - Class 12 Physics Viva Exam Sample Question and Answers

Therefore, below are few probable questions and answers candidates must be prepared for in their Physics Viva CBSE Practical Exams Preparation 2023.

1. Measurement of Resistance

• To determine resistance per cm of a given wire by plotting a graph of potential difference versus current.
• To find the resistance of a given wire using a metre bridge and hence determine the resistivity (specific resistance) of its material.
• To verify the laws of combination (series) of resistances using a metre bridge.
• To verify the laws of combination (parallel) of resistances using a metre bridge.

2. Measurement of Electromotive Force and Potential Difference

• To compare the EMF of two given primary cells using a potentiometer.
• To determine the internal resistance of a given primary cell using a potentiometer.

3.  Galvanometer, Ammeter and Voltmeter

• To determine the resistance of a galvanometer by half-deflection method and to find its figure of merit.
• To convert the given galvanometer (of known resistance and figure of merit) into a voltmeter of desired range and to verify the same.
• To convert the given galvanometer (of known resistance and figure of merit) into an ammeter of desired range and to verify the same.

4. Frequency of AC (Alternating Current) Mains

• To find the frequency of the AC mains with a sonometer.

5. Focal Length of Spherical Mirrors

• To find the value of v for different values of u in the case of a concave mirror and to find the focal length.
• To find the focal length of a convex mirror, using a convex lens.

6. Focal Length of Spherical Lenses

• To find the focal length of a convex lens by plotting graphs between u and v or between 1/u and 1/v.
• To find the focal length of a concave lens using a convex lens.

7. Refractive Index of Prism Material, Glass Slab and Transparent Liquid

• To determine the angle of minimum deviation for a given prism by plotting a graph between the angle of incidence and the angle of deviation.
• To determine the refractive index of a glass slab using a travelling microscope.
• To find the refractive index of a liquid by using a convex lens and plane mirror.

8. Semiconductor Diodes and Transistors

• To draw the I-V characteristic curve of a p-n junction in forward bias and reverse bias.
• To draw the characteristic curve of a Zener diode and to determine its reverse breakdown voltage.
• To study the characteristics of a common emitter npn (or pnp) transistor and to find out the values of current and voltage gains.

Hence, the above-mentioned questions and answers will guide students to be better equipped for their CBSE Practical Exams Preparation 2023.

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