TBSE Class 12 Physics Compartment 2026: Important Chapters and Key Formulas

TBSE Class 12 Physics Compartment 2026 is scheduled for June 28, 2026 — Electrostatics and Optics together carry 29 of the 70 theory marks making them the two highest-priority units for last-minute revision.

The Tripura Board of Secondary Education (TBSE) Class 12 Physics compartment exam gives students who could not clear the subject in the main board examination a second opportunity. The theory paper carries 70 marks and closely follows the NCERT Class 12 Physics syllabus. Knowing which chapters to prioritise and which formulas to memorise can make a decisive difference to your score in the limited preparation time available.

• The theory paper carries 70 marks and practicals carry 30 marks — the written exam duration is 3 hours.
• Electrostatics (15 marks) is the highest-scoring unit followed by Optics (14 marks).
• Magnetic Effects, Electromagnetic Induction and AC, and Current Electricity together carry an additional 23 marks.
• TBSE papers are modelled directly on NCERT — in-text examples and end-of-chapter exercises are the primary source of questions.
• Students must carry their TBSE compartment admit card on June 28, 2026; entry to the examination hall is not permitted without it.

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TBSE Class 12 Physics Compartment 2026 Exam Pattern

The TBSE Class 12 Physics compartment paper follows the same structure as the main board examination. Students who failed only in theory will sit for the 70-mark written paper; those who also need to repeat practicals will appear for the practical component separately.

The theory paper includes very short answer (1-mark), short answer (2-mark and 3-mark) and long answer (5-mark) questions along with numericals and case-based items. NCERT in-text questions and end-of-chapter exercises directly inform the question pattern across all sections.

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Chapter-wise Weightage for TBSE Class 12 Physics 2026

The 70-mark theory paper is distributed across 9 units. The approximate unit-wise marks distribution below is based on the standard NCERT curriculum that TBSE follows.

Units I, VI, III and IV — Electrostatics, Optics, Magnetic Effects, and Electromagnetic Induction and AC — together carry 45 of the 70 theory marks. Scoring well in these four units alone is sufficient to clear the compartment exam.

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Important Topics in High-Scoring Units

Within each high-weightage unit, certain topics appear more frequently in TBSE board papers. Focus your remaining revision days on these specific topics first.

Unit I — Electrostatics (15 marks)

• Coulomb’s law and superposition principle for multiple charges
• Electric field lines — properties, patterns and diagrams
• Gauss’s theorem and its applications to spherical shell, infinite wire and infinite plane sheet
• Relation between electric field and potential: E = −dV/dr
• Capacitors in series and parallel; equivalent capacitance calculations
• Energy stored in a capacitor and effect of a dielectric slab on capacitance

Unit VI — Optics (14 marks)

• Refraction through a prism and derivation of the prism formula
• Lens maker’s formula and applications to combinations of lenses
• Total internal reflection — critical angle, conditions and optical fibre application
• Compound microscope and astronomical telescope — working principle and magnification
• Young’s double slit experiment — fringe width formula (β = λD/d) and conditions for bright and dark fringes
• Diffraction at a single slit and condition for the first dark fringe

Unit III — Magnetic Effects of Current and Magnetism (8 marks)

• Biot-Savart law and its application to a straight conductor and a circular loop
• Ampere’s circuital law and its application to a solenoid
• Force on a current-carrying conductor in a magnetic field
• Moving coil galvanometer and its conversion to an ammeter or voltmeter

Unit IV — Electromagnetic Induction and Alternating Currents (8 marks)

• Faraday’s laws of electromagnetic induction and Lenz’s law with energy conservation reasoning
• Self-inductance, mutual inductance and motional EMF (ε = Blv)
• LCR series circuit — impedance, phase angle, power factor and resonance condition
• Transformer — turns ratio, efficiency and types of energy losses

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Key Formulas for TBSE Class 12 Physics Compartment 2026

Use this unit-wise formula list as your revision checklist. Writing each formula by hand before the exam builds the rapid recall needed in a timed 3-hour paper.

Electrostatics

Current Electricity

Magnetism and Electromagnetic Induction

Optics

Modern Physics — Dual Nature, Atoms and Nuclei

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Last-Minute Preparation Tips for TBSE Physics Compartment 2026

Use the days before June 28, 2026 with a clear priority order. These tips are aimed at maximising marks under time pressure.

• Start with Electrostatics — it carries the most marks (15) and its concepts underpin other units including Current Electricity and Electromagnetic Induction.
• Solve every NCERT example and exercise — TBSE papers draw directly from NCERT; skipping any solved example is a risk to your score.
• Write formulas by hand every morning — keep a one-page formula sheet and review it before each study session.
• Do at least 5 numericals per unit from Electrostatics, Optics, Magnetism and Alternating Currents.
• Attempt previous-year TBSE Class 12 Physics papers — question pattern and difficulty are consistent across years.
• Do not skip Unit IX (Electronic Devices) — 5 marks can be secured with focused revision of p-n junctions, diodes and basic logic gates.
• Always write SI units in every numerical answer — missing units is one of the most common causes of avoidable mark loss.

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