CBSE Class 12 Applied Physics Boards 2020 Question Paper

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Access comprehensive previous year question papers for Class 12 Physics using the CBSE Class 12 Applied Physics Boards 2020 Question Paper. Designed to align with the 2026-27 CBSE academic guidelines, these solved papers help students assess their exam readiness and understand official marking schemes.

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APPLIED PHYSICS
1. (a) Define electric field intensity. Give its SI unit. Write the formula for electric field intensity due to a point charge. Calculate the electric field intensity at a distance of           50 cm from a charge of 50 μC.
 
(b) What is a capacitor ? Derive a formula for the energy stored in a capacitor. 
OR
Draw a figure showing the combination of three capacitors in series. Write the formula for the net capacitance when three capacitors are connected in series. Three capacitors of 2 μF, 3 μF and 6 μF are connected in series. Find the net capacitance.
 
(c) Define Gauss theorem. Apply this theorem to find the electric field intensity inside a hollow charged conductor.
 
2. (a) Define magnetic field. Write the SI unit of magnetic field intensity.
          Write the formula for the magnetic field intensity due to a straight current-carrying conductor. What is the value of the magnetic field at the surface of the conductor ? 
 
    (b) What are the factors that affect the force on a charge moving in a magnetic field ? Write the formula for the force. State the cases when the charge will experience      (i) maximum, and (ii) minimum force. 
                                                                                        OR
         Define the terms Magnetic flux density and Permeability. Write their SI units. Write the name of a substance having large permeability.
 
(c) Derive an expression for the magnetic field intensity at the centre of a current-carrying circular coil.
 
3. (a) Define nuclear fission and nuclear fusion. Give three differences between them. 
 
   (b) What are radio-isotopes ? Write the name of two radio-iostopes and write one use of each.
                                                            OR
     What are radiation hazards ? Name two radiation hazards. How can we protect ourselves from radiation hazards ?
 
(c) Explain the principle, construction and working of a nuclear reactor.
 
4. (a) What are semiconductors ? Give the atomic structure of Ge and Si.
         How is the conductivity of semiconductors affected by rise in temperature ?
 
    (b) Draw the symbol of p-n junction. Draw a circuit diagram of p-n junction in forward biasing. Explain the working of a p-n junction in forward biasing.
                                        OR
        What is a rectifier ? Explain the working of a p-n junction as a full-wave rectifier.
 
   (c) Draw a symbol of an n-p-n transistor. Draw a circuit diagram of n-p-n transistor with proper biasing and explain transistor action.
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Previous Year Question Papers: Class 12 Physics

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FAQs

Where can I download the official PDF for CBSE Class 12 Applied Physics Boards 2020 Question Paper?

The CBSE Class 12 Applied Physics Boards 2020 Question Paper is available for download on StudiesToday.com. It includes complete set with all sections so that Class 12 students can practice with the exact same paper that came in the CBSE exams.

Are the solutions for CBSE Class 12 Applied Physics Boards 2020 Question Paper based on the official CBSE marking scheme?

Yes, the solutions for CBSE Class 12 Applied Physics Boards 2020 Question Paper are prepared by subject matter experts as per official marking scheme. Class 12 students will understand the structure of answers and 'step-marks' methodology Physics.

How does solving CBSE Class 12 Applied Physics Boards 2020 Question Paper help in preparing for the 2026 exams?

Solving previous year papers like CBSE Class 12 Applied Physics Boards 2020 Question Paper is important to understand repeat themes and question difficulty levels of Physics. It helps Class 12 students to test their time management skills too.

Can I access CBSE Class 12 Applied Physics Boards 2020 Question Paper in different languages?

Yes, where applicable, CBSE Class 12 Applied Physics Boards 2020 Question Paper is available in both English and Hindi mediums. All students from Class 12 can access Physics study material in their preferred language.

Is there a charge to download the CBSE Class 12 Physics solved papers?

No, all previous year question papers on StudiesToday, including CBSE Class 12 Applied Physics Boards 2020 Question Paper, are provided free of charge in mobile-friendly PDF.