CBSE Class 12 Physics Exam 2026: Last‑Minute Topics & Weightage

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• Updated on 19 Feb, 2026, 6:14 PM, by Arman Kumar

The CBSE Class 12 Physics exam 2026 is scheduled for February 20 from 10:30 AM to 1:30 PM. Students should focus on key topics like Optics, Magnetism & Electrostatics that carry major marks to maximise performance on exam day. (

The Central Board of Secondary Education (CBSE) will conduct the Class 12 Physics board examination 2026 on February 20, 2026, from 10:30 AM to 1:30 PM. Students preparing for the exam are advised to prioritise key chapters and high‑weightage topics to secure better marks in the theory paper.

CBSE 12 Physics: High‑Priority Topics (Approx. 70% Theory Marks)

Examiners traditionally set questions from units that carry the bulk of marks in the Physics curriculum. Below are the last‑minute preparation topics that contribute significantly to the total theory score of 70 marks:

• Optics (18 Marks)

This is the highest weighted unit. Students should revise:

Lens Maker’s Formula
Young’s Double Slit Experiment (YDSE)
Ray diagrams for microscopes and telescopes

• Magnetic Effects & Magnetism (17 Marks)

Key areas to cover include:

Moving Coil Galvanometer (principle and conversion)
Ampere’s Circuital Law
Force on a moving charge in a magnetic field

• Electrostatics (16 Marks)

Important topics for revision include:

Gauss’s Law applications
Capacitance of a parallel plate capacitor (including dielectric)
Electric potential and field concepts

• Modern Physics (12 Marks)

Students should focus on:

Einstein’s Photoelectric Equation
Bohr’s Atomic Model
Nuclear binding energy concepts

• Semiconductors (7 Marks)

Findings in this unit

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include:

Logic gates (especially NAND/NOR as universal gates)
Full‑wave rectifier circuit diagrams
P–N junction characteristics

CBSE 12 Physics Unit‑Wise Weightage (Theory)

Here’s an overview of the chapter‑wise weightage distribution for the board exam: )

Unit

Topics Covered

Marks

Electrostatics & Current Electricity

Electric charges/fields, Capacitance, Current electricity

Magnetism & EMI/AC

Moving charges & magnetism, Electromagnetic induction, AC

EM Waves & Optics

Ray optics, optical instruments, wave optics

Modern Physics

Dual nature, atoms, nuclei

Electronic Devices

Semiconductor electronics

Total

—

Exam Pattern & Revision Tips

The Physics question paper will have 33 compulsory questions divided across five sections (A-E), with a mix of MCQs, short‑ and long‑answer questions. Students are advised to:

Review NCERT textbooks thoroughly for conceptual clarity.
Solve sample papers and last‑year papers to understand question trends.
Practice numerical problems and key derivations.

ISC Date Sheet 2027 to Be Released Soon: Check Class 12 Timetable, Expected Dates & Download StepsISC Date Sheet 2027 to Be Released Soon: Check Class 12 Timetable, Expected Dates & Download Steps