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Physics · Class 12 Science

Jharkhand Jac Class 12 Physics — Real Previous-Year Papers

with complete answers

Real previous-year board papers, year by year — the official exam pattern, the full question paper, and every question solved the concept-first way. Distinct from the chapter-wise textbook bank.

2018–2026
Years of papers
7
Total Papers
7
Real Board Papers
0
Sample papers
299
Real-paper Q & A
0
Sample-paper Q & A

Real board-paper questions available, by year

48 Q2026complete
47 Q2025complete
48 Q2024complete
54 Q2023complete
—2022Not available
—2021Not available
34 Q2020complete
34 Q2019complete
34 Q2018complete

JAC Intermediate Board 2026 · Set ANNUAL

Real board examination

About this paper

The real Class-12 board examination held in 2026. Every question below is solved the concept-first way. Sample papers are labelled honestly — never shown as a past exam.

Total marks
—
Questions
—
Duration
—
Sections
—

The marks / questions / duration above are the official exam pattern. We currently have 48 of this paper’s questions, with 48 fully solved. Questions we couldn’t yet extract or verify are held — never shown as complete.

The question paper

The questions we hold for this paper, laid out by section. Solutions are on the Answers tab.

Board Examination

Physics

JAC Intermediate Board 2026 · Set ANNUAL

Series/Set: ANNUALRoll No. ________
Time Allowed: —Maximum Marks: —
Section A

Q1.
When a glass rod is rubbed with a silk cloth the charge acquired by glass rod is
  • (a) Positive
  • (b) Negative
  • (c) Both positive and negative
  • (d) None of these
[1]
Q2.
An object has a negative charge of 1 coulomb. The number of excess electrons on it is
  • (a) 6.25 x 10^-18
  • (b) 1.6 x 10^19
  • (c) 1.6 x 10^-19
  • (d) 6.25 x 10^18
[1]
Q3.
A charge Q, is enclosed by a Gaussian spherical surface of radius R. If the radius is doubled, then the outward electric flux will
  • (a) decrease to half
  • (b) increase two times
  • (c) remain unchanged
  • (d) increase four times
[1]
Q4.
The unit of electric capacitance is
  • (a) volt
  • (b) newton
  • (c) farad
  • (d) ampere
[1]
Q5.
If a uniform wire of resistance 16 ohm is cut into four equal parts and attached in parallel combination, the equivalent resistance of the combination is
  • (a) 1 ohm
  • (b) 4 ohm
  • (c) 1/4 ohm
  • (d) 1/16 ohm
[1]
Q6.
Drift velocity Vd varies with the intensity of electric field E as per the relation
  • (a) Vd is proportional to E^2
  • (b) Vd is proportional to 1/E
  • (c) Vd is proportional to sqrt(E)
  • (d) Vd is proportional to E
[1]
Page 1 of 6
Q7.
Two long parallel wires each carrying a current of 1 A in the same direction, are placed 1 m apart. The force of attraction between them is (a) 2 x 10⁷ N/m (b) 2 x 10^-4 N/m (c) 2 x 10^-7 N/m (d) 4 x 10^-7 N/m
[1]
Q8.
In a uniform magnetic field B, a conductor of length l is placed parallel to the magnetic field. When a current I is passed through the conductor, the force on the conductor will be (a) IlB (b) IB/l (c) Il/B (d) zero
[1]
Q9.
The magnetic lines of force inside a bar magnet (a) do not exist (b) depend on area of cross-section of the bar magnet (c) are from N-pole to S-pole of the magnet (d) are from S-pole to N-pole of the magnet
[1]
Q10.
Which of the following materials is most suitable for making a permanent magnet? (a) Soft iron (b) Nickel (c) Copper (d) Steel
[1]
Q11.
Wb/m² is the unit of (a) magnetic field (b) magnetic potential (c) magnetic flux (d) magnetic moment
[1]
Q12.
The self-inductance of a coil is measured by (a) Electrical inertia (b) Electrical friction (c) Induced emf (d) Induced current
[1]
Q13.
The unit of inductance is (a) henry (b) weber (c) newton (d) ohm
[1]
Q14.
The mean value of an alternating current in a half cycle is (a) I0/sqrt(2) (b) I0/2 (c) 2*I0/pi (d) none of these
[1]
Q15.
Which of the following has the smallest wavelength? (a) Micro-waves (b) Red light (c) Ultraviolet radiation (d) gamma-rays
[1]
Q16.
Which electromagnetic radiation is used for photography in fog? (a) Radio wave (b) Infrared ray (c) Ultraviolet ray (d) X-ray
[1]
Page 2 of 6
Q17.
The image formed by a simple microscope is (a) imaginary and erect (b) imaginary and inverted (c) real and erect (d) real and inverted
[1]
Q18.
Refraction takes place due to (a) change in the speed of light (b) no change in the speed of light (c) change in the colour of light (d) polarization
[1]
Q19.
The concept of secondary wavelets was given by (a) Fresnel (b) Newton (c) Huygens (d) Maxwell
[1]
Q20.
The size of the obstacle for the diffraction of light should be (a) much larger than the wavelength of light (b) much smaller than the wavelength of light (c) of the order of wavelength of light (d) anything can happen
[1]
Q21.
Photoelectric effect supports (a) wave nature of light (b) particle nature of light (c) dual nature of light (d) polarization nature of light
[1]
Q22.
The force which causes scattering of alpha particles in Rutherford's alpha particle scattering experiment is (a) Gravitational force (b) Coulomb force (c) Magnetic force (d) Nuclear force
[1]
Q23.
The equivalent energy of 10 g of substance is (a) 9 x 10¹4 J (b) 9 x 10¹3 J (c) 3 x 10¹6 J (d) 6 x 10¹3 J
[1]
Q24.
In n-type semiconductor what kind of impurity is found? (a) Valency of three (b) Valency of five (c) Valency of two (d) Valency of one
[1]
Q25.
The width of forbidden band is maximum for (a) metals (b) non-conductors (c) semi-conductors (d) none of these
[1]
Section B

Q1.
What is the dielectric constant of a metal?
[1]
Page 3 of 6
Q2.
What is the S.I. unit of mobility (mu)?
[1]
Q3.
Which law determines the direction of an induced current?
[1]
Q4.
Mention any one property of electromagnetic waves.
[1]
Q5.
When light passes from a denser medium to a rarer medium, and the angle of incidence equals the critical angle, what is the angle of refraction?
[1]
Q6.
What do you understand by the term 'diffraction of light'?
[1]
Q7.
Define work function of metal.
[1]
Q8.
What do you mean by mass defect of a nucleus?
[1]
Q9.
What are majority charge carriers in a n-type semiconductor?
[1]
Q10.
Derive an expression for the electric field at a point on equatorial (broad side on) position of an electric dipole.
[3]
Q11.
Derive an expression for electric potential at a point due to a point charge.
[3]
Page 4 of 6
Q12.
How can a galvanometer be converted into a ammeter? Calculate the effective resistance of the ammeter.
[3]
Q13.
Derive an expression for the coefficient of mutual induction of two long coaxial solenoids.
[3]
Q14.
Derive an expression for the effective (equivalent) focal length of two thin lenses in contact.
[3]
Q15.
Write and explain Einstein's equation of the photoelectric effect.
[3]
Q16.
Mention Rutherford's nuclear atomic model. What are its drawbacks?
[3]
Q17.
Write distinguishing features between conductors, semiconductors and insulators based on energy band diagrams.
[3]
Q18.
State Gauss's law in electrostatics. Using this law derive an expression for the electric field due to a uniformly charged infinite plane sheet.
[5]
Page 5 of 6
Q19.
Mention Kirchhoff's rules for electrical networks and apply them to find an expression for the balance condition for Wheatstone bridge.
[5]
Q20.
What is Biot-Savart law? Derive an expression for the magnetic field at a point on the axis of a current carrying circular loop.
[5]
Q21.
(a) Derive an expression for average or mean value of alternating current for half cycle. (b) Derive an expression for root mean square value of alternating current for full cycle.
[5]
Q22.
Draw ray diagram of a compound microscope. Deduce an expression for its magnifying power when image is formed at near point.
[5]
Q23.
State Huygens' principle. Establish the laws of refraction of light using Huygens' principle.
[5]
Page 6 of 6