Скачать или смотреть JKBOSE PHYSICS CLASS 12TH || MODEL PAPER || 2025-26 || GUESS PAPER || IMPORTANT QUESTIONS

💡 High-Weightage Units (Marks Distribution)
Focus on the units that carry the maximum marks, as they are crucial for a high score.
| Unit | Sub Topics | Marks Allotted |
|---|---|---|
| Optics | Ray Optics and Optical Instruments, Wave Optics | 14 |
| Electrostatics | Electric Charges and Fields, Electrostatic Potential and Capacitance | 09 |
| Magnetic Effects of Current and Magnetism | Moving Charges and Magnetism, Magnetism and Matter | 09 |
| Electromagnetic Induction and Alternating Currents | Electromagnetic Induction, Alternating Current | 09 |
| Atoms and Nuclei | Atoms, Nuclei | 08 |
| Current Electricity | Current Electricity | 07 |
| Electronic Devices | Semiconductor Electronics | 07 |
| Dual Nature of Radiation and Matter | Dual Nature of Radiation and Matter | 04 |
| Electromagnetic Waves | Electromagnetic Waves | 03 |
| Total | | 70 |
🎯 Most Important Expected Topics
Based on the official syllabus and the high-weightage chapters, the following concepts often feature as derivation, conceptual, or numerical questions:
1. Electrostatics & Current Electricity
Derivations: Coulomb's Law (vector form), Electric field due to a dipole (axial and equatorial point), Gauss's Law and its applications (e.g., field due to infinite plane sheet, spherical shell).
Capacitance: Parallel plate capacitor (with and without dielectric), Energy stored in a capacitor.
Current Electricity: Kirchhoff's Laws (for circuits), Wheatstone Bridge (Principle and derivation), Meter Bridge, Potentiometer (principle and applications), and the relation between drift velocity and electric current.
2. Magnetism and AC
Moving Charges: Biot-Savart Law and its applications (e.g., field on the axis of a circular current loop), Ampere's Circuital Law and its applications (e.g., Solenoid/Toroid).
Moving Coil Galvanometer (Principle and conversion to Ammeter/Voltmeter).
Electromagnetic Induction: Faraday's Laws of Induction, Lenz's Law, Eddy Currents, and Self/Mutual Inductance.
Alternating Current (AC): LCR Series Circuit (phasor diagram and resonance), Transformer (Principle and types), and AC Generator.
3. Optics (Ray and Wave)
Ray Optics: Derivation of Lens Maker's Formula and Mirror Formula, Image formation by Compound Microscope and Astronomical Telescope (Ray diagram and magnifying power).
Wave Optics: Huygen's Principle and using it to prove laws of reflection/refraction, Young's Double Slit Experiment (fringe width derivation).
Polarization (Malus' Law, Brewster's Law).
4. Modern Physics (Dual Nature, Atoms, Nuclei)
Dual Nature: Einstein's Photoelectric Equation and experimental observations, de Broglie relation.
Atoms: Bohr's Model (postulates, derivation of radius/energy), Energy level diagrams, and Hydrogen Spectrum (series).
Nuclei: Mass defect and Binding Energy, Nuclear Fission and Fusion.
5. Semiconductor Electronics
Semiconductor Diode: p-n Junction (formation), I-V Characteristics (forward and reverse bias).
Rectifiers: Half-wave and Full-wave Rectifier (Circuit diagram, working, and input/output waveforms).
✅ Best Preparation Strategy
Solve Model Papers and PYQs: Always practice with the official JKBOSE Model Papers for the 2024-25 session and solve Previous Year Questions (PYQs) to understand the exam pattern and recurring themes.
Focus on Derivations and Numericals: Physics heavily relies on these. Master the high-weightage derivations listed above and practice numerical problems, especially from Units I, II, III, IV, and VI.
Draw and Label Diagrams: For topics like optical instruments, AC circuits (phasor diagrams), and semiconductor devices, practice drawing neat, well-labeled diagrams.
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