CBSE Board Exam 2025: The Central Board of Secondary Education (CBSE) has released the date sheet for Class 10 and 12 students appearing in the 2025 board exams. According to the timetable, the Class 12 Physics board exam 2025 is scheduled for February 21, 2025. With less than three months to prepare, students are rigorously preparing for this crucial exam.
To assist them ace the CBSE Class 12 Physics Board Exam 2025, Shailendra Pandey, Faculty, Physics Wallah has compiled a set of repeated questions. While these expert suggestions will add value to the preparation, students are advised to complete their syllabus thoroughly and practise questions from textbooks, sample papers, model papers, and previous years’ question papers available on the board’s official website.
CBSE Class 12 Physics Board Exam 2025: Repeated questions in previous board exams
Chapter 1: Electric Charges and Fields
- State Gauss’s theorem and apply it to find the electric field due to an infinitely long straight uniformly charged wire. (Years: 2019, 2021, 2023)
- Derive the expression for the electric field due to an electric dipole at a point on its axial line. (Years: 2017, 2020)
Chapter 2: Electrostatic Potential and Capacitance
- Derive the expression for the potential energy of a system of two point charges. (Years: 2016, 2020)
- Explain the working of a parallel plate capacitor with a dielectric slab. Derive the expression for its capacitance. (Years: 2017, 2021)
Chapter 3: Current Electricity
- State and explain Kirchhoff’s laws with an example. (Years: 2017, 2019, 2023)
- Derive the relation between current density, drift velocity, and electric field. (Years: 2016, 2021)
- Numerical: A potentiometer is used to measure the EMF of a cell. Explain why a potentiometer is preferred over a voltmeter for such measurements. (Years: 2018, 2022)
Chapter 4: Moving Charges and Magnetism
- Derive the expression for the force acting on a charged particle moving in a uniform magnetic field. (Years: 2018, 2020, 2023)
- State Biot-Savart law. Use it to derive the expression for the magnetic field at the center of a circular loop carrying current. (Years: 2017, 2021)
Chapter 6: Electromagnetic Induction
- State Faraday’s laws of electromagnetic induction and derive the expression for induced EMF in a coil. (Years: 2015, 2018, 2021)
- Explain the working of an AC generator with a labeled diagram. (Years: 2017, 2020)
Chapter 7: Alternating Current
- Derive the expression for the impedance of an LCR series circuit. (Years: 2017, 2020)
- Explain the concept of resonance in an AC circuit. What is the condition for resonance? (Years: 2018, 2021)
Chapter 9: Ray Optics and Optical Instruments
- Derive the lens maker’s formula for a convex lens. (Years: 2016, 2018, 2022)
- Explain total internal reflection with two conditions for it to occur. (Years: 2017, 2020)
Chapter 10: Wave Optics
- State the conditions for constructive and destructive interference in Young’s Double Slit Experiment (YDSE). (Years: 2018, 2020, 2023)
- Define wavefront and explain the types (spherical, plane, and cylindrical wavefronts). (Years: 2017, 2019)
- Explain Huygens’ principle and use it to prove the laws of reflection or refraction. (Years: 2016, 2018, 2022)
- Derive the condition for constructive and destructive interference in YDSE. (Years: 2015, 2021)
Chapter 11: Dual Nature of Matter and Radiation
- State Einstein’s photoelectric equation and explain its significance. (Years: 2018, 2021)
- Derive the expression for the de Broglie wavelength of a particle. (Years: 2016, 2020)
Chapter 12: Atoms
- Explain Bohr’s postulates and derive the expression for the radius of an electron’s orbit in a hydrogen atom. (Years: 2017, 2020)
Chapter 13: Nuclei
- Explain the binding energy curve and its significance. (Years: 2015, 2020)
Chapter 14: Semiconductor Electronics
- Explain the working of a p-n junction diode. (Years: 2017, 2020, 2022)
- Draw the output waveform for the half-wave and full-wave rectifier. (Years: 2016, 2021)
CBSE Board Exam 2025: Preparation tips for Class 12 Physics board exam
Understand the Syllabus: Familiarize yourself with the latest CBSE syllabus, focusing on chapters with higher weightage like Optics, Electrostatics, and Current Electricity. Be aware of topics that have been removed or modified to streamline your preparation.
Organize Study Materials: Use NCERT textbooks and the NCERT Wallah YouTube Channel (Vijeta Series) as your primary resources. Additionally, refer to supplementary guides like SL Arora for extra numericals and keep CBSE sample papers and past years’ question papers handy for practice.
Create a Study Plan: Divide your study time between theory and numericals (e.g., 40% theory, 60% numericals). Make sure to allocate time for daily revisions and mock tests to stay on track and evaluate your progress regularly.
Master the Basics: Ensure a clear understanding of fundamental concepts, formulas, and definitions. Revise key formulas and derivations daily and maintain a formula sheet for quick reference during revision sessions.
Practice Numericals: Solve all solved and unsolved numericals from NCERT, focusing on high-weightage topics like Current Electricity, Electrostatics, Ray and Wave Optics, Magnetic Effects of Current, and Alternating Current. Gradually move to tougher problems from reference books.
Focus on Important Derivations: Memorize and practice step-by-step derivations, as they are often asked in exams. Focus on derivations such as the lens maker’s formula, electric field due to a dipole, Biot-Savart law, and EMF in a rotating coil (AC generator).
Solve Sample Papers: Solve at least three sample papers under exam conditions during the final month of preparation. Analyze your performance to identify weak areas, time management issues, and areas needing further revision.
Revise Regularly: Regularly revise theoretical concepts, formulas, and key questions to reinforce your knowledge. Practice numericals and derivations until you’re confident and comfortable with solving them in the exam.
Use Flashcards: Create flashcards for formulas, units, dimensions, and laws, making them ideal for quick revision of important concepts. They will help you quickly recall essential information before exams.
Take Care of Presentation: Practice drawing neat, labeled diagrams such as ray and circuit diagrams. When answering, write derivations systematically by starting with the formula, including proper units in numerical answers, and boxing the final answer to highlight it.
