Which chapters have the highest weightage in CBSE Class 12 Physics?

Optics with Electromagnetic Waves has typically carried the largest block, around 18 of 70 marks, followed by Magnetism with EMI and AC at around 17, and Electrostatics with Current Electricity at around 16. These are typical figures; confirm with the latest CBSE curriculum document.

How many questions are in the CBSE Class 12 Physics paper?

In recent years, typically 33 questions in five sections: 16 one-mark, 5 two-mark, 7 three-mark, 2 case-based four-mark and 3 five-mark questions, all compulsory with internal choice in some. Check the latest sample paper on cbse.gov.in.

Is NCERT enough for CBSE Class 12 Physics?

For the board paper, yes: derivations, diagrams, assertion-reason facts and numericals are drawn from NCERT, including in-text examples. Add the NCERT exemplar and the official sample papers for practice. A reference book is only needed for JEE or NEET level problems.

How many derivations should I prepare for Class 12 Physics?

Around 25 to 30 standard derivations cover what has appeared in recent papers; the list in this guide is a good starting set. Practise each with its labelled diagram, because the diagram typically carries its own marks.

When is the CBSE Class 12 Physics exam 2027?

CBSE typically holds Class 12 board exams between mid-February and April, with practicals before the theory papers. The exact date is in the official date sheet on cbse.gov.in; do not rely on dates shared on social media.

CBSE Class 12 Physics Preparation 2027: Weightage, Plan

CBSE Class 12 Physics preparation 2027 goes better when you stop treating the subject as one big block and start treating it as nine NCERT units with known weights, a fixed set of derivations, and a short list of numerical types. The paper is 70 marks of theory and 30 of practicals, three hours long, and in recent years roughly half of it has been competency-based: MCQs, assertion-reason and case-based passages that test whether you can apply a formula, not just recite it. This guide gives the section-wise pattern, typical unit weightage, the derivations and numericals worth memorising, and a 60-day plan.

CBSE Class 12 Physics paper pattern: 70 theory + 30 practical

The theory paper is 70 marks; the remaining 30 come from the practical examination (experiments, activities, record book and viva) conducted at the school. In recent years the theory paper has typically had 33 questions in five sections, all compulsory, with internal choice in a few questions. Confirm the current layout with the latest sample paper and marking scheme on cbse.gov.in.

Section A: 16 one-mark questions, typically 12 MCQs and 4 assertion-reason questions.
Section B: 5 very short answer questions of 2 marks each.
Section C: 7 short answer questions of 3 marks each.
Section D: 2 case-based questions of 4 marks each, with sub-parts.
Section E: 3 long answer questions of 5 marks each, typically with internal choice.
Total 70 marks in 3 hours with 15 minutes of reading time before writing begins.

CBSE 12th Physics chapter wise weightage: typical NCERT unit marks

CBSE publishes a unit-wise split in the curriculum document, and the paper follows it closely. The grouping below is the typical one in recent years, so treat the numbers as approximate and check the latest document. The key observation is that the first six NCERT chapters (electricity and magnetism) together carry roughly half the paper.

Electrostatics (Electric Charges and Fields, Electrostatic Potential and Capacitance) plus Current Electricity: typically around 16 marks.
Magnetic Effects of Current and Magnetism (Moving Charges and Magnetism, Magnetism and Matter) plus Electromagnetic Induction and Alternating Current: typically around 17 marks.
Electromagnetic Waves plus Optics (Ray Optics and Optical Instruments, Wave Optics): typically around 18 marks, the largest block.
Dual Nature of Radiation and Matter plus Atoms and Nuclei: typically around 12 marks.
Electronic Devices (Semiconductor Electronics: Materials, Devices and Simple Circuits): typically around 7 marks.

Class 12 Physics important derivations list

Derivations appear mainly in the 3-mark and 5-mark questions, and the marking scheme typically awards separate marks for the labelled diagram, the setup, the key steps and the final expression. Write each derivation from memory twice a week in the last month. The list that has repeated across recent papers and sample papers is manageable:

Electric field due to a dipole on the axial and equatorial lines; torque on a dipole in a uniform field; electric field of an infinite plane sheet and a uniformly charged thin spherical shell using Gauss's law.
Capacitance of a parallel plate capacitor with and without a dielectric; energy stored in a capacitor; potential due to a dipole.
Drift velocity and the expression for current; Wheatstone bridge balance condition using Kirchhoff's laws; internal resistance of a cell.
Biot-Savart law applied to a circular loop (field on the axis); Ampere's law for a straight wire and a solenoid; force between two parallel current-carrying conductors; torque on a current loop and the moving coil galvanometer.
Motional EMF; self-inductance of a solenoid; mutual inductance of two coils; EMF of an AC generator; power in an LCR circuit and the resonance condition; the transformer.
Mirror formula and lens maker's formula; refraction at a spherical surface; the prism formula for minimum deviation; magnifying power of a compound microscope and an astronomical telescope.
Young's double slit fringe width; conditions for constructive and destructive interference; the laws of reflection and refraction from Huygens' principle.
Einstein's photoelectric equation and the stopping potential graph; de Broglie wavelength; Bohr's postulates leading to the radius and energy of the nth orbit; the binding energy curve explanation.
p-n junction diode as a half-wave and full-wave rectifier with input and output waveforms.

Class 12 Physics numericals chapter wise and how to score on them

Numericals appear in every section: as MCQs with a calculation, as 2-mark problems, inside case-based passages and as one part of a 5-mark question. Keep a one-page formula sheet per chapter and practise the standard types: Coulomb's law with three charges, electric field and potential of point charges, capacitors in series and parallel, equivalent resistance and Kirchhoff's laws, cells in series, a charged particle in a magnetic field (radius and period), the galvanometer conversion to an ammeter or voltmeter, induced EMF in a moving rod, peak and RMS values, impedance of an LCR circuit, lens and mirror positions with magnification, combination of thin lenses, fringe width, photoelectric work function and threshold frequency, Bohr orbit energies and spectral lines, half-life and activity, and the mass defect.

In the marking scheme, writing the formula, substituting with units and giving the answer with a unit typically carry separate credit, so never jump to a bare number. A sign error in optics or a unit error in a nuclear calculation is the most common way to lose a mark that was otherwise earned. Written-answer practice with step marking, which Myrix Learn offers alongside chapter-wise practice tests on the CBSE pattern, trains the habit of writing the step that earns the mark.

Class 12 Physics case based and assertion reason questions

Section D gives two case-based passages of 4 marks each. A passage describes a device or situation (a capacitor with a dielectric slab, a potentiometer, a cyclotron, a transformer, a compound microscope, a photocell, a p-n junction) followed by sub-questions, often a mix of MCQs and short answers. In recent years, Electrostatics, Ray Optics, Alternating Current and Semiconductor Electronics have been common sources. Read the whole passage once, underline the numbers and the device, and answer only from what the passage plus NCERT says.

Assertion-reason questions are four one-mark questions at the end of Section A, and the options are the same each time. Judge the reason statement on its own before deciding whether it explains the assertion. Typical pairs test things like why a lightning conductor is pointed, why a transformer core is laminated, why the sky appears blue, why a photocell current depends on intensity but not frequency, and why a p-n junction has a depletion region. Both question types reward reading the NCERT text itself, including the in-text examples and the boxed notes, not only a formula list.

CBSE 12th Physics 60 day study plan

This CBSE 12th Physics 60 day study plan assumes about two hours of Physics per day and a full three-hour paper on alternate Sundays. It also leaves time for the practical examination, which is usually held before the theory papers; keep your record book and viva notes ready in parallel.

Days 1 to 8: Electric Charges and Fields, Electrostatic Potential and Capacitance, Current Electricity. Formula sheets, Gauss's law applications, capacitor and Kirchhoff numericals, Wheatstone bridge derivation.
Days 9 to 17: Moving Charges and Magnetism, Magnetism and Matter, Electromagnetic Induction, Alternating Current. Biot-Savart and Ampere applications, galvanometer, inductance derivations, LCR and transformer numericals.
Days 18 to 28: Electromagnetic Waves, Ray Optics and Optical Instruments, Wave Optics. Ray diagrams for every instrument, lens maker and prism derivations, Young's double slit, Huygens' proofs. The biggest block, so eleven days.
Days 29 to 36: Dual Nature of Radiation and Matter, Atoms, Nuclei. Photoelectric graphs, Bohr model, spectral series, half-life and binding energy numericals.
Days 37 to 41: Semiconductor Electronics. Energy bands, diode characteristics, rectifiers with waveforms, and whichever devices are in the current syllabus.
Days 42 to 53: Six full sample papers from cbse.gov.in, one every second day, with an error log and re-tests of weak chapters on the alternate days.
Days 54 to 60: Formula sheets, the derivations list written once each, assertion-reason sets, and the error log. No new material. Sleep properly before the exam.

Common mistakes in CBSE Class 12 Physics and the fixes

The mistakes that cost the most: a derivation without the labelled diagram, a numerical without units, the wrong sign convention in optics, attempting both options of an internal-choice question, and spending so long on Section C that the 5-mark questions are rushed. Fix the time split: about 20 minutes for Section A, 15 for B, 45 for C, 25 for D, 60 for E, and 15 to check. Use the reading time to pick your internal-choice options and to spot the numericals you can do quickly.

Between now and the exam, log every wrong answer with the chapter and the type of error, and revisit the log weekly. Myrix Learn brings wrong answers back through spaced revision and its AI tutor is grounded in NCERT, so a doubt about why the fringe width changes in water gets the textbook explanation; it costs ₹99 for the first month and then ₹297/month, and students who complete 10 study days in a month get 25% of that month's fee back as a study reward (50% after 15 study days). The method is the same with or without the app: attempt, mark against NCERT, log, re-attempt.