Jkbose 12th Class Physics Bi-Annual Private 2026 Guess Paper Check All Important Questions

Jkbose 12th Class Physics Bi-Annual Private 2026 Guess Paper Check All Important Questions

In this article, I will provide the most important and expected questions for the JKBOSE 12th Class Physics Bi-Annual Private Examination 2026. These guess questions are selected from high-weightage chapters, previous year examinations, and the latest JKBOSE syllabus to help students focus on the most important topics before the examination.

The Physics Guess Paper 2026 includes important questions from Electrostatics, Current Electricity, Magnetism, Electromagnetic Induction, Optics, Dual Nature of Matter, Atoms and Nuclei, Semiconductor Electronics, and Communication Systems. Students are advised to prepare all the listed questions thoroughly to maximize their chances of scoring excellent marks in the upcoming examination.

MOST EXPECTED LONG QUESTIONS (5 MARKS)

1. State Gauss's Law. Derive expression for electric field due to infinite line charge and infinite sheet. Deduce Coulomb’s law and electric field due to conducting sphere.
2. State Coulomb's law in electrostatics. Express it in vector form and explain its importance. Define one coulomb of charge.
3. State and explain the principle of superposition in electrostatics. Derive an expression for force on a charge due to multiple charges in terms of position vector.
4. Derive expression for torque experienced by an electric dipole placed in a uniform electric field and find net force.
5. Electric field due to dipole on axial and equatorial line.
6. Derive expression for capacitance, principle of capacitor, and parallel plate capacitor with or without dielectric.
7. Derive torque experienced by an electric dipole in uniform electric field.
8. Describe Young’s Double Slit Experiment. Derive expression for fringe width, and explain bright & dark bands.
9. What is compound microscope? Draw diagram and derive magnifying power.
10. Explain Astronomical Telescope — construction, working, and expression.
11. State Huygens’ Principle and explain laws of reflection and refraction.
12. Difference between paramagnetic, diamagnetic & ferromagnetic materials.
13. State Faraday’s laws of EMI and explain one method of producing induced emf.
14. Define an electric dipole and electric dipole moment. Derive an expression for electric field intensity on the equatorial line of a dipole.
15. Derive an expression for capacitance of a parallel plate capacitor with dielectric slab between the plates.
16. State Biot–Savart Law and derive an expression for magnetic field at the centre of a circular coil carrying current.
17. Give the principle, construction and working of a moving coil galvanometer.
18. Derive Lens Maker’s formula. What are assumptions made during the derivation?
19. Discuss diffraction of light at a single slit and find the width of central maximum.
20. Derive an expression for fringe width in case of Young’s double slit experiment of interference of light.
21. Derive an expression for Lens Maker’s formula for a convex lens.

SHORT ANSWER TYPE QUESTIONS (3 MARKS)

1. Explain conservation of Electric charges along with examples.
2. Derive expression for Force experienced by current carrying conductor placed in external magnetic field at certain angle.
3. State and explain Kirchhoff's voltage law.
4. State Lenz's Law. Prove that it is in accordance with law of conservation of Energy.
5. Define Total-Internal-Reflection. State its conditions and hence define critical angle.
6. Explain Laws of photoelectric effect on the basis of Einstein's photoelectric equation.
7. Write three postulates of Bohr's model of atom.
8. PN Junction diode?
9. Draw circuit diagram of PN Junction diode as a full wave-rectifier Explain its working.
10. Calculate the electric dipole moment of a dipole of length 2000 Å having magnitude of each charge as 3 × 10⁻⁶ Coulomb.
11. State and explain Kirchhoff’s laws.
12. Give three properties of diamagnetic, para magnetic and ferro magnetic substance.
13. State and explain Faraday’s laws of electromagnetic induction.
14. Give six properties of electromagnetic waves.
15. A ray of light suffers minimum deviation while passing through prism of refractive index 1.5 and refraction angle of 60°. Find the angle of minimum deviation and angle of incidence.
16. What are coherent sources? Write four conditions for obtaining sustained interference of light.
17. Give three properties each of α, β and γ rays.
18. What is rectifier? How is Pn-junction diode used as a full wave rectifier?
19. Calculate Coulomb force between two α-particles separated by a distance of 3.2 × 10⁻¹⁵ m in air.
20. What is wheat stone bridge? Apply Kirchhoff's law of wheat stone bridge to derive the condition for balancing the bridge.
21. Derive an expression for torque acting on a bar magnet suspended in a uniform magnetic field.
22. What are electromagnetic waves? Give their characteristics.
23. State Huygen's principle and prove laws of reflection on the basis of wave theory.
24. Find energy and momentum of a photon of wavelength 6600 Å.
25. Explain the concept of nuclear binding energy. What is mass defect of a nucleus? How do you account for it?
26. Using Kirchhoff's laws derive the condition for balance of a Wheatstone bridge circuit.
27. Define drift velocity of electrons and establish relation between drift velocity and electric current.
28. A conducting wire of 100 turns is wound over and near the centre of a solenoid of 100 cm length and 2 cm radius having 600 turns. Calculate mutual inductance of two coils.
29. Using phasor treatment derive an expression for impedance and phase angle of LCR circuit.
30. Explain refraction through prism and show δ = (i₁ + i₂) – A.
31. Distinguish between excitation potential and ionization potential.
32. What are nuclear forces? Give their important characteristics.
33. What is meant by depletion region in a junction diode? Explain its formation.
34. Define resistivity and state its S.I. unit. Explain how the resistivity of a conductor varies with temperature.
35. What is an ammeter? How can a galvanometer be converted into an ammeter?
36. State Lenz’s law and show that it does not violate the law of conservation of energy.
37. A capacitor of 1 μF is connected to a.c supply. Find r.m.s value of current through the capacitor.
38. Calculate de-Broglie equation for a material particle.
39. On the basis of Bohr’s atomic model, find an expression for radius of nth orbit of a hydrogen atom.
40. Explain the forward and reverse bias characteristic curve of a p–n junction.
41. Distinguish between intrinsic and extrinsic semiconductors.

VERY SHORT ANSWER TYPE QUESTIONS (2 MARKS)

1. How many electrons pass through a wire in 2 minutes if the current passing through the wire is 0.3 A?
2. How does the mutual inductance of a pair of coils change when separation between the coils is increased?
3. An object placed 10 cm in front of a concave mirror of radius of curvature 15 cm. Find the nature and position of image.
4. Why is electron revolving round the nucleus of an atom in their own orbit?
5. For what purpose the cells are connected in (i) series (ii) parallel?
6. A transformer cannot work on direct current (d.c.). Why?
7. Why no interference pattern is observed when two coherent sources are far apart?
8. Draw energy level diagram for hydrogen atom.
9. How does conductivity of a semiconductor change with temperature?
10. A polythene rubbed with wool is found to have negative charge of 3 × 10⁻⁷ C. Estimate the number of electrons transferred and from which to which.
11. Define an Equipotential surface. Draw Equipotential surface for point charge.
12. What is meant by Mobility of a charge? Write its S.I. unit.
13. Give some limitations of Ohm’s Law.
14. What are important uses of Ultraviolet and X-Rays?
15. What is the focal length of equivalent system of a convex lens of focal length 30 cm in contact with a concave lens of focal length 20 cm? Is system converging or diverging?
16. What are coherent and incoherent sources of light?
17. Define distance of closest approach and Impact Parameter.
18. No two equipotential surfaces intersect each other. Why?
19. State principle of a.c generator. From where does the electric energy come in it?
20. What does an electromagnetic wave consist of? On what factors does its velocity in vacuum depend?
21. How does refraction of light affect the length of the day?
22. For glass-air interface, the critical angle is C. Will the critical angle for glass-water interface be greater or less than C? Explain.
23. A ray of light incident on an equilateral glass prism (μ = √3) moves parallel to the base line of the prism inside it. Find the angle of incidence.
24. Why do we fail to observe diffraction from a wide slit illuminated by monochromatic light?
25. Write two important significances of binding energy per nucleon curve.
26. State four characteristics of electromagnetic waves.
27. Write four applications of optical fibers.
28. What are conditions for sustained interference of light?
29. Explain the term stopping potential and threshold frequency.
30. Define mean and effective value of alternating current. Write relation between them.
31. Calculate the frequency of a.c at which inductive reactance of 0.7 mH is 220 Ω.
32. Define total internal reflection of light. Write two conditions necessary for total internal reflection.
33. Define work function and threshold frequency. Give their S.I units.
34. Find the de Broglie wavelength of an electron accelerated through a potential difference of 100 eV.
35. Give two points of difference between nuclear fission and nuclear fusion.
36. Give four points of difference/similarity between p-type and n-type semiconductor.

MOST IMPORTANT NUMERICAL CHAPTER WISE

• Chapter 1: Electrostatics – Coulomb's Law, Electric Field, Potential Energy, Capacitance.
• Chapter 2: Current Electricity – Current, Resistance, Resistivity, Temperature Dependence, Series/Parallel Combination, Power.
• Chapter 4: Electromagnetic Induction & Alternating Current – Inductive Reactance, Capacitive Reactance.
• Chapter 6: Optics – Mirror Formula, Lens Formula, Power of Lens, Combination of Lenses, Refractive Index, Magnifying Power, Young's Experiment.
• Chapter 7: Dual Nature of Radiation & Matter – Threshold Frequency, Maximum Kinetic Energy, De-Broglie Wavelength.