Class 12 PhysicsChapter Summaries
14 chapters · Quick revision in under 3 minutes per chapter · Updated 2025-26
Electric Charges and Fields
Covers Coulomb's law, electric field, field lines, Gauss's law and its applications. Electric dipole in external field is a key derivation topic.
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Electrostatic Potential and Capacitance
Covers electric potential, potential due to a dipole, equipotential surfaces, and capacitors. Energy stored in a capacitor and dielectrics are key numericals.
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Current Electricity
Covers Ohm's law, drift velocity, resistivity, Kirchhoff's laws, and Wheatstone bridge. The internal resistance of a cell and EMF are important numerical topics.
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Moving Charges and Magnetism
Covers force on a moving charge (Lorentz force), force on a current-carrying conductor, Biot-Savart law, Ampere's circuital law, and the moving coil galvanometer.
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Magnetism and Matter
Covers bar magnets, earth's magnetism, and magnetic properties of materials (diamagnetic, paramagnetic, ferromagnetic). Hysteresis loop is an important concept.
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Electromagnetic Induction
Covers Faraday's laws, Lenz's law, self and mutual inductance. Eddy currents and their applications are included.
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Alternating Current
Covers AC circuits with R, L, C individually and in series. Resonance, power factor, and LC oscillations are key topics. Transformers are also covered.
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Electromagnetic Waves
Covers the nature of electromagnetic waves, their transverse character, and the electromagnetic spectrum. Properties of EM waves and their uses are frequently asked.
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Ray Optics and Optical Instruments
Covers reflection and refraction, total internal reflection, lenses, and optical instruments (microscope, telescope). Lens maker's formula and power of a lens are key numericals.
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Wave Optics
Covers Huygens' principle, interference (Young's double slit experiment), diffraction, and polarisation. YDSE calculations are common board numericals.
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Dual Nature of Radiation and Matter
Covers photoelectric effect, Einstein's photoelectric equation, wave-particle duality, and de Broglie wavelength. Millikan's experiment verification is included.
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Atoms
Covers Rutherford's model, Bohr's atomic model, hydrogen spectrum, and energy levels. Bohr's postulates and the Rydberg formula are frequently asked.
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Nuclei
Covers nuclear mass, binding energy, radioactive decay, and nuclear reactions. Half-life calculations and nuclear fission and fusion are key topics.
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Semiconductor Electronics
Covers energy bands, types of semiconductors, p-n junction diode, rectifiers, and transistors. Logic gates (AND, OR, NOT, NAND, NOR) are included.
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Frequently Asked Questions
Can I revise Class 12 Physics in one day using summaries?
Yes. Each chapter summary here takes under 3 minutes to read. With 14 chapters, you can cover all of Class 12 Physics in a focused 2–3 hour session. Use these summaries to identify gaps — then revisit only those chapters in detail.
Are chapter summaries enough for CBSE Class 12 Physics board exam?
Summaries are for revision, not first learning. Use them after you've already studied the chapter — they quickly confirm what you remember and flag what you don't. For first-time study, read the NCERT textbook and work through important questions chapter-by-chapter.
What is covered in Class 12 Physics chapter summaries?
Each summary here covers the main concepts of the chapter, key topics that CBSE tests, and important points for the board exam. Deleted topics (removed from the 2025-26 CBSE syllabus) are clearly marked so you don't waste time on content that won't be tested.
What is the fastest way to revise Class 12 Physics for CBSE boards?
Read the chapter summary, then immediately close it and try to recall the key topics listed — without looking. Anything you miss, mark for one more read. This active recall method is proven to be 3× more effective than re-reading the textbook, and takes a fraction of the time.