What are the most important topics and questions from each chapter of Physics Class 12 CBSE?

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The most important topics and questions from each chapter of Physics Class 12 CBSE are those that carry the highest weightage in board exams, such as Electrostatics, Current Electricity, Magnetism, Electromagnetic Induction, Optics, Dual Nature of Matter, Atoms and Nuclei, and Communication Systems.

Class 12 Physics Chapter-Wise Important Topics

Chapter	Key Topics to Focus	Why Important?
Electrostatics	Gauss’s Law, Electric Dipole, Capacitors	High-weightage derivations and numericals
Current Electricity	Ohm’s Law, Kirchhoff’s Rules, Wheatstone Bridge	Frequently asked in exams
Magnetic Effects of Current	Biot–Savart Law, Ampere’s Law, Motion of Charged Particles	Conceptual + numerical problems
Electromagnetic Induction	Faraday’s Laws, Lenz’s Law, Eddy Currents	Scoring + derivations
Alternating Current	AC circuits, Resonance, Transformers	Formula-based numericals
Optics	Ray Diagrams, Young’s Double Slit Experiment, Lens Formula	14 marks weightage (one of the highest)
Dual Nature of Matter	Photoelectric Effect, de Broglie Wavelength	Conceptual + direct questions
Atoms & Nuclei	Rutherford Model, Radioactivity, Nuclear Reactions	Easy and direct theory
Communication Systems	Amplitude & Frequency Modulation, Bandwidth	Theory-based and very easy

Most Expected Questions for Class 12 Physics

State and explain Gauss’s Law with an example.
Derive the expression for the capacitance of a parallel plate capacitor.
Explain Kirchhoff’s rules with circuit diagram.
Derive lens formula using ray diagrams.
Explain Young’s double slit experiment and interference of light.
State Einstein’s photoelectric equation.
Explain nuclear fission and fusion with examples.

Tips to Prepare Quickly

Start with NCERT textbook questions because CBSE exam is NCERT-based.
Focus on derivations in Electrostatics, Current Electricity, and Optics.
Practice previous 5 years’ board exam papers to identify repeated questions.
For theory-based chapters like Communication Systems and Atoms, read and memorize NCERT lines.
Revise formulas daily and maintain a separate formula notebook.

What are the most important topics and questions from each chapter of Physics Class 12 CBSE?

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