Central Board of Secondary Education (CBSE) has released the date sheet for Class 10th and 12th Board Exam 2025. The exam for class 12th students will start on 15th February 2025 and will end on 4th April 2025. , Class 12 Physics Exam will be held on February 21, 2025. With less than three months to go, students are preparing intensively to excel in this important subject.
To help them in their preparation, Shailendra Pandey, faculty member of Physics Wallah, has prepared a list of expected questions for Class 12 Physics Board Exam 2025. While these expert insights are valuable, students are also encouraged to focus on textbooks, sample papers. , model question papers, and previous year papers are available on the official website of CBSE.
This article highlights some expected questions from key chapters like Atoms, Nuclei, and Semiconductor Electronics.
CBSE Board Exam 2025: Expected Questions from Atoms, Nuclei, and Semiconductor Electronics – Materials, Devices and Simple Circuits
Chapter 12: Atoms
Question 1: Explain Rutherford’s model of the atom and its limitations.
Question 2: Derive an expression for the radius of the nth orbital of a hydrogen atom using Bohr’s model.
Question 3: State and derive an expression for the energy of an electron in the nth orbit of a hydrogen atom.
Question 4: Explain the spectral series of the hydrogen atom (Lyman, Balmer, etc.).
Question 5: Numerical: Calculate the wavelength of the photon emitted during the transition of an electron between two energy levels in a hydrogen atom.
Chapter 13: Nuclei
Question 1: Define mass defect and binding energy. Draw out the relationship between them.
Question 2: Explain nuclear power and its characteristics.
Question 3: Explain nuclear fission and fusion, with their application in energy production.
Chapter 14: Semiconductor Electronics – Materials, Devices, and Simple Circuits
Question 1: Explain the difference between intrinsic and extrinsic semiconductors.
Question 2: Discuss the working of pn junction diode in forward and reverse bias.
Question 3: Draw and explain the circuit diagram of half-wave rectifier.
Question 4: Derive an expression for the efficiency of a full-wave rectifier.
CBSE Board Exam 2025: Preparation Tips for Class 12 Physics Board Exam
Understand the course: Familiarize yourself with the latest CBSE syllabus focusing on high weightage chapters 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 NCERT Wallah YouTube channel (Winner series) as your primary source. Additionally, refer to supplementary guides like SL Arora for extra numericals and keep CBSE sample papers and previous year papers handy for practice.
Make a study plan: Divide your study time between theory and numerical (ie, 40% theory, 60% numerical). Make sure to allocate time for daily revision and mock tests to stay on track and regularly assess your progress.
Master the basics: Ensure a clear understanding of basic concepts, formulas, and definitions. Revise key formulas and derivatives daily and maintain a formula sheet for quick reference during revision sessions.
Practice Numerical: 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 from reference books to difficult problems.
Focus on important derivatives: Memorize and practice step-by-step derivations, as they are often asked in exams. Focus on derivatives such as the lens maker’s formula, the electric field due to dipoles, the Biot-Savart law, and the EMF in a rotating coil (AC generator).
Solve Sample Papers: Solve at least three sample papers on exam conditions during the last month of preparation. Analyze your performance to identify weak areas, time management issues, and areas that need further revision.
Revise regularly: Revise theoretical concepts, formulas and key questions regularly to strengthen your knowledge. Practice arithmetic and derivatives until you are confident and comfortable solving them in the exam.