CBSE 12 Physics Sure Shot Questions and Answers PDF: Download Important Class 12 Physics Question Bank

CBSE Class 12 Exam 2025: The Central Board of Secondary Education (CBSE) Class 12th board exams are ongoing. The Physics exam for science stream students is the next important exam scheduled for February 21, 2025 (Friday). Here, the important topics and questions are provided, which have major chances of coming to the 2025 exam paper. These are the chapters/topics that are favourites to CBSE experts because of their utter importance in learning the deep concepts of physics. And thus, every year questions have been asked from these. We have gathered such topics here with a set of questions that will match the real question paper. There is no surety that these questions will be asked directly as they are but will definitely have the sentences that demand the same. Continue reading and explore the sure-shot questions for the CBSE Class 12 Physics exam 2024-25.

Check | CBSE Class 12 Physics Syllabus 2025

CBSE 12 Physics Sure Shot Questions For 2025 Exam

The list of questions provided below are of high importance from exam point of view. You will definitely see questions from these topics in a similar manner. Thus, go through these questions and revise the mentioned concepts accordingly.

Electrostatics

1. State and explain Gauss’s theorem. Derive an expression for the electric field due to an infinitely long charged wire using Gauss’s law.
2. Derive the expression for the capacitance of a parallel plate capacitor with and without a dielectric medium.
3. Define electric flux and write its SI unit.
4. Two charges +q and −q are placed at a distance 2d2d2d apart. Find the electric field at the equatorial point.

Current Electricity

1. State and derive Ohm’s law using the concept of drift velocity.
2. Explain the color coding of resistors with an example.
3. Derive an expression for the equivalent resistance in a series and parallel combination of resistors.
4. What is Wheatstone’s bridge? Derive the condition for balance in the bridge.
5. Define electromotive force (EMF) and terminal voltage. Explain why the terminal voltage is always less than EMF.

Magnetism & Moving Charges

1. State and explain Biot-Savart’s law. Derive an expression for the magnetic field at the center of a current-carrying circular loop.
2. Derive an expression for the force experienced by a charged particle moving in a uniform magnetic field.
3. Derive an expression for the magnetic field along the axis of a current-carrying solenoid.
4. State and explain Ampere’s Circuital Law.

Electromagnetic Induction & Alternating Current

1. State and explain Faraday’s laws of electromagnetic induction.
2. Derive an expression for self-inductance of a solenoid.
3. Derive an expression for the impedance in an LCR circuit.
4. What is power factor? How does it affect power consumption in an AC circuit?

Electromagnetic Waves & Optics

1. Derive an expression for fringe width in Young’s double-slit experiment.
2. What is total internal reflection? Explain with the help of optical fibers.
3. What is resolving power? Derive an expression for the resolving power of a telescope.
4. Explain the principle of polarisation and mention its applications.
5. Derive prism formula.
6. State Huygens principle.
7. Lens makers formula.

Modern Physics

1. Derive the expression for the de Broglie wavelength of a particle.
2. What is the photoelectric effect? Explain Einstein’s photoelectric equation.
3. Draw and explain the I-V characteristics of a PN junction diode.
4. Explain the working of a transistor as an amplifier.

Nuclei & Semiconductor Devices

1. Explain nuclear fission and nuclear fusion with suitable examples.
2. What are logic gates? Draw the truth tables for AND, OR, NOT, NAND, and NOR gates.
3. What is rectification? Explain the working of a full-wave rectifier with a labelled diagram.

Check | CBSE Class 12 Physics Competency-Based Questions With Answer Key 2024-25

CBSE 12 Physics Important Topics For 2025 Exam

The questions provided above are framed from the below mentioned topics asked in previous year question papers. Check their reoccurring pattern that supports their importance for the CBSE board exams 2025.

Electrostatics

1. Gauss’s theorem and its application (2020, 2021, 2023)
2. Capacitance of a parallel plate capacitor with/without dielectric (2020, 2022, 2024)
3. Electric flux and SI unit (2020, 2022, 2024)
4. Electric field at the equatorial point of an electric dipole (2021, 2023)

Current Electricity

1. Ohm’s Law & derivation using drift velocity (2020, 2022, 2024)
2. Colour coding of resistors (2021, 2023)
3. Series and parallel combination of resistors – derivation (2020, 2022)
4. Wheatstone’s bridge – condition for balance (2021, 2023, 2024)
5. EMF vs terminal voltage (2020, 2022, 2024)

Magnetism & Moving Charges

1. Biot-Savart’s law & application to circular loop (2020, 2021, 2023)
2. Force on a charged particle in a uniform magnetic field (2021, 2023, 2024)
3. Magnetic field along the axis of a solenoid (2021, 2023)
4. Ampere’s Circuital Law (2020, 2022, 2024)

Electromagnetic Induction & Alternating Current

1. Faraday’s laws of electromagnetic induction (2020, 2022, 2024)
2. Self-inductance of a solenoid – derivation (2021, 2023)
3. Eddy currents & applications (2020, 2021, 2023)
4. Impedance in an LCR circuit – derivation (2020, 2022)
5. Power factor & its significance (2021, 2023, 2024)

Electromagnetic Waves & Optics

1. Maxwell’s equations & significance (2021, 2023)
2. Fringe width derivation in Young’s double-slit experiment (2020, 2022, 2024)
3. Total internal reflection & optical fibres (2021, 2023)
4. Resolving power of a telescope – derivation (2020, 2022)
5. Polarisation – principle & applications (2021, 2023, 2024)

Modern Physics

1. de Broglie wavelength derivation (2020, 2022, 2024)
2. I-V characteristics of a PN junction diode (2020, 2022, 2024)
3. Zener diode as a voltage regulator (2021, 2023)
4. Transistor as an amplifier (2020, 2022, 2024)

Nuclei & Semiconductor Devices

1. Nuclear fission vs nuclear fusion (2020, 2022, 2024)
2. Logic gates & truth tables (AND, OR, NOT, NAND, NOR) (2021, 2023)
3. Full-wave rectifier – working & diagram (2020, 2022, 2024)

Revise these topics wisely and get ready for the boards. Make sure to leave no page unturned that might give a sense of regret in future. Stay positive and prepare hard!

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