⚡ Physics Board Focus
📊 Chapter-wise Important Questions
✅ June 2026 Updated
🎯 Score 70/70 Strategy
CBSE Class 12 Physics
Important Questions for Board Exam 2027
Chapter-wise most important questions for CBSE Class 12 Physics Board Exam 2027. Includes 2-mark, 3-mark, 5-mark, Case-based, and Assertion-Reason questions with answering tips to help you score 70/70.
70
Theory Marks
8+
High Priority Chapters
100+
Important Questions
5
Question Types
Based on latest CBSE pattern (2024–2026) — Includes Case-based & Assertion-Reason Questions
⚡ CBSE Class 12 Physics — Important Questions for Board 2027
Chapter-wise • 2/3/5 Marks • Case-based • Assertion-Reason | KotaPoint.in
⚡Why These Important Questions Matter for CBSE Class 12 Physics Board 2027
CBSE Class 12 Physics Board Exam carries 70 marks in theory. With the right preparation and focus on important questions, scoring 65–70/70 is very much achievable. These questions are compiled based on previous year trends (2022–2026) and the latest CBSE pattern, which now includes more competency-based questions (Case-based and Assertion-Reason).
Key Insight: In recent years, CBSE has increased the weightage of application-based and case-based questions. Simply memorizing definitions is no longer enough. You must practice writing proper derivations, solving numericals step-by-step, and drawing neat diagrams.
🔥High Weightage Chapters (Must Focus)
These chapters together contribute more than 60% of the Physics theory paper. Prioritize them.
Top Priority Chapters:
• Electrostatics + Current Electricity (Very High)
• Magnetic Effects of Current + EMI + AC (High)
• Ray Optics + Wave Optics (High)
• Dual Nature + Atoms & Nuclei (High)
• Semiconductor Devices (Scoring)
• Electrostatics + Current Electricity (Very High)
• Magnetic Effects of Current + EMI + AC (High)
• Ray Optics + Wave Optics (High)
• Dual Nature + Atoms & Nuclei (High)
• Semiconductor Devices (Scoring)
For complete weightage details, check our detailed guide: NEET 2027 Physics Chapter Wise Weightage (the pattern is very similar for boards).
📝Chapter-wise Important Questions
1. Electrostatics
- Derive an expression for the electric field due to a uniformly charged infinite plane sheet using Gauss’s theorem.
- Two point charges +q and –q are placed at a distance 2a apart. Find the electric field and potential at the midpoint.
- Derive the expression for the capacitance of a parallel plate capacitor with a dielectric slab of thickness t (t < d) introduced between the plates.
- State and explain the principle of a van de Graaff generator. Why is it enclosed in a steel tank filled with nitrogen or freon at high pressure?
- Obtain the expression for the energy stored in a charged capacitor. Also derive the expression for energy density.
2. Current Electricity
- State Kirchhoff’s laws. Apply them to find the current in different branches of a Wheatstone bridge circuit.
- Derive the expression for the internal resistance of a cell using a potentiometer.
- Explain with a circuit diagram how a potentiometer can be used to compare the emf of two primary cells.
- Derive the condition for balance of a Wheatstone bridge using Kirchhoff’s laws.
- A battery of emf 10 V and internal resistance 1 Ω is connected to a resistor network. Find the current through each resistor.
3. Moving Charges, Magnetism, EMI & AC
- Derive an expression for the force on a current-carrying conductor placed in a uniform magnetic field.
- Derive the expression for the torque acting on a current loop placed in a uniform magnetic field. Hence define magnetic dipole moment.
- State Faraday’s laws of electromagnetic induction. Derive the expression for induced emf in a rod rotating in a magnetic field.
- Derive the expression for the impedance of an LCR series circuit connected to an AC source. Also draw the phasor diagram.
- Explain the working of a transformer with a labelled diagram. Why is the core of a transformer laminated?
4. Ray Optics & Wave Optics
- Derive the lens maker’s formula for a thin lens.
- Derive the expression for the magnifying power of a compound microscope.
- Derive the expression for fringe width in Young’s double slit experiment. What happens to the fringe width if the entire apparatus is immersed in water?
- Explain the phenomenon of diffraction of light at a single slit. Draw the intensity distribution curve.
- Derive the expression for the resolving power of an optical instrument. How does it depend on the wavelength of light used?
5. Dual Nature, Atoms & Nuclei
- State Einstein’s photoelectric equation. Explain how it accounts for the threshold frequency and the stopping potential.
- Derive the expression for de Broglie wavelength associated with an electron accelerated through a potential difference V.
- Using Bohr’s postulates, derive the expression for the radius and energy of the nth orbit of hydrogen atom.
- Define binding energy per nucleon. Draw a graph showing variation of binding energy per nucleon with mass number. Explain the release of energy in nuclear fission and fusion.
- Assertion (A): Photoelectric effect demonstrates the particle nature of light.
Reason (R): In photoelectric effect, the number of photoelectrons emitted is proportional to the intensity of incident light.
6. Semiconductor Devices
- Explain the formation of depletion region in a p-n junction diode with a neat diagram.
- Draw the circuit diagram of a full wave rectifier using two diodes and explain its working with input and output waveforms.
- Explain the working of a transistor as an amplifier in CE configuration. Draw the input and output characteristics.
- What is a logic gate? Draw the truth table and circuit symbol of NAND and NOR gates. Why are they called universal gates?
- Case-based: In many electronic devices, we use LEDs. Explain the working principle of an LED. Why are LEDs preferred over incandescent bulbs?
📌Types of Questions in CBSE Class 12 Physics Board Exam
📝
2 Mark Questions
Short answer type. Usually definitions, differences, or simple derivations. Write to the point with proper diagrams wherever required.
📝
3 Mark Questions
Require explanation with diagram or derivation. Show all steps clearly. Diagrams should be neat and labelled.
📝
5 Mark Questions
Long answer type — full derivations, numerical problems with multiple parts, or explanation with diagrams. Proper presentation fetches full marks.
📋
Case-based Questions
Based on a paragraph or real-life situation. Read the case carefully and answer the questions that follow. Application of concepts is tested.
✅
Assertion-Reason Questions
Two statements are given. You have to choose the correct option (Both true & R explains A / Both true but R does not explain A / A true R false / A false R true).
💡How to Answer Physics Board Questions (Pro Tips)
1
Write Step-by-Step
In derivations and numericals, show every step clearly. Even if the final answer is wrong, you can get marks for correct steps.
2
Draw Neat Diagrams
Use pencil for diagrams. Label all parts properly. A good diagram can fetch 1–2 extra marks easily.
3
Use Proper Units
Always write the unit with the final answer in numerical questions. Missing units can lead to deduction of marks.
4
Attempt All Questions
Even if you don’t know the full answer, write whatever you know. Partial marks are given for relevant points.
✅Interactive Practice Tracker — Mark Questions You Have Practiced
Check the questions/chapters you have practiced well. Track your preparation progress.
🎯 Your Physics Board Practice Progress
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Practice Completed
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📅30-Day Physics Board Exam Revision Plan
Recommended Approach:
• Days 1–10: Revise all important derivations + diagrams
• Days 11–20: Solve previous 5 years board papers + sample papers
• Days 21–30: Focus on weak areas + full mock tests + quick revision of formulas
• Days 1–10: Revise all important derivations + diagrams
• Days 11–20: Solve previous 5 years board papers + sample papers
• Days 21–30: Focus on weak areas + full mock tests + quick revision of formulas
📚Best Resources for CBSE Class 12 Physics Board Exam
Must-have Resources:
• NCERT Physics Class 12 (Part 1 & 2) — Primary book
• NCERT Exemplar Problems — For higher-order questions
• Previous 5–10 Years CBSE Board Papers
• CBSE Sample Papers (Latest Pattern)
• One good reference book (HC Verma / SL Arora / Pradeep) for extra practice
• NCERT Physics Class 12 (Part 1 & 2) — Primary book
• NCERT Exemplar Problems — For higher-order questions
• Previous 5–10 Years CBSE Board Papers
• CBSE Sample Papers (Latest Pattern)
• One good reference book (HC Verma / SL Arora / Pradeep) for extra practice
❓Frequently Asked Questions
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