This Multiple Choice Question (MCQ) Practice Paper has been designed by Sankalp Institute based on the detailed requirements of the examination conducted by the Jharkhand Academic Council (JAC). It provides additional practice for students who face problems regarding how to understand and answer objective type questions; how to wisely utilize their allotted examination amount of time; and to identify frequent problem areas with regards to their responses.
This Practice Paper has been prepared in a straightforward format that is easy to read and understand and designed specifically for the needs of all types of students, providing them with an opportunity to see how questions are constructed without being confused by the way in which they are presented. The content of this Practice Paper follows the JAC Class 12 syllabus and pattern of examinations exactly, and contains questions from frequently tested and important upcoming topics in the final JAC Class 12 examination.
The purpose of this Practice Paper is to allow students to increase their understanding of the subject topic, improve accuracy with responses, and increase speed in problem-solving. The completion of these practice questions will allow students to assess their current level of preparation in comparison with other students, as well as identify any specific weaknesses in their studies, and ultimately develop their confidence over time. Completing the Practice Paper under similar conditions to those of an actual examination will decrease students' anxiety and allow for a much calmer and focused student during the final exam.
In conclusion, the MCQ Practice Paper will provide students with a model, reliable, and useful way to prepare for their JAC Class 12 exam.
Objective Type Questions (MCQs)
Q1. The SI unit of electric flux is:(a) N C⁻¹
(b) V m⁻¹
(c) N m² C⁻¹
(d) C m⁻²
Q2. Which law states that the electric flux through a closed surface is proportional to the enclosed charge?
(a) Coulomb’s law
(b) Gauss’s law
(c) Ohm’s law
(d) Faraday’s law
Q3. The dimensional formula of electric potential is:
(a) ML²T⁻³A⁻¹
(b) ML²T⁻²A⁻¹
(c) MLT⁻²A⁻¹
(d) ML²T⁻¹A⁻²
Q4. The resistance of a conductor mainly depends on:
(a) Length only
(b) Area only
(c) Material and temperature
(d) Voltage applied
Q5.The slope of a V–I graph represents:
(a) Resistance
(b) Conductance
(c) Power
(d) Current
Q6. Kirchhoff’s second law is based on the principle of conservation of:
(a) Charge
(b) Energy
(c) Momentum
(d) Mass
Q7. The equivalent resistance of two equal resistances connected in parallel is:
(a) R
(b) 2R
(c) R/2
(d) R²
Q8. The unit of current density is:
(a) A
(b) A m⁻¹
(c) A m⁻²
(d) C m⁻²
Q9. Drift velocity of electrons in a conductor increases when:
(a) Length increases
(b) Area increases
(c) Electric field increases
(d) Temperature increases
Q10. One electron volt (eV) is equal to:
(a) 1.6 × 10⁻¹⁹ J
(b) 1.6 × 10¹⁹ J
(c) 9 × 10⁹ J
(d) 3.6 × 10⁶ J
(a) Current only
(b) Radius only
(c) Current and radius
(d) Length of wire
Q12. The SI unit of magnetic flux is:
(a) Tesla
(b) Weber
(c) Henry
(d) Gauss
Q13. Fleming’s left-hand rule is used to determine:
(a) Direction of magnetic field
(b) Direction of induced current
(c) Direction of force
(d) Direction of emf
Q14. The force acting on a current-carrying conductor placed in a magnetic field is maximum when the angle is:
(a) 0°
(b) 30°
(c) 45°
(d) 90°
Q15. The unit of self-inductance is:
(a) Tesla
(b) Weber
(c) Henry
(d) Farad
Q16. Lenz’s law is a consequence of the law of conservation of:
(a) Charge
(b) Energy
(c) Mass
(d) Momentum
Q17. Mutual inductance depends on:
(a) Current
(b) Resistance
(c) Geometry of coils
(d) Temperature
Q18. The core of a transformer is laminated to reduce:
(a) Hysteresis loss
(b) Copper loss
(c) Eddy current loss
(d) Magnetic leakage
Q19. An AC source has frequency 50 Hz. Its time period is:
(a) 0.02 s
(b) 0.05 s
(c) 20 s
(d) 50 s
Q20. The power factor of a purely inductive circuit is:
(a) 1
(b) 0
(c) 0.5
(d) −1
(a) Coulomb
(b) Volt
(c) Farad
(d) Henry
Q22. Capacitance of a parallel plate capacitor increases when:
(a) Plate area decreases
(b) Plate separation increases
(c) Dielectric is inserted
(d) Voltage increases
Q23. The energy stored in a capacitor depends on:
(a) Charge only
(b) Voltage only
(c) Capacitance and voltage
(d) Resistance
Q24. A capacitor blocks the flow of:
(a) DC
(b) AC
(c) Both AC and DC
(d) High frequency only
Q25. The dielectric constant of vacuum is:
(a) 0
(b) 1
(c) ∞
(d) 8.85
Q26. The unit of electric dipole moment is:
(a) C
(b) C m
(c) N m
(d) V m
Q27. An electric dipole placed in a uniform electric field experiences:
(a) Net force only
(b) Torque only
(c) Both force and torque
(d) Neither force nor torque
Q28. The potential energy of a dipole is minimum when it is:
(a) Parallel to field
(b) Perpendicular to field
(c) Anti-parallel to field
(d) At any angle
Q29. Coulomb’s law is valid for:
(a) Moving charges
(b) Stationary charges
(c) Magnetic poles
(d) Current elements
Q30. The value of Coulomb’s constant depends on:
(a) Medium
(b) Charge
(c) Distance
(d) Shape
(a) Wave theory of light
(b) Particle nature of light
(c) Both wave and particle
(d) Classical theory
Q32. The stopping potential in photoelectric effect depends on:
(a) Intensity
(b) Frequency
(c) Distance
(d) Area
Q33. The work function is expressed in the unit of:
(a) Joule
(b) Electron volt
(c) Watt
(d) Newton
Q34. X-rays are produced when:
(a) Fast electrons strike a metal target
(b) Light passes through prism
(c) Current flows in coil
(d) Charges are at rest
Q35. The wavelength of de-Broglie waves increases when:
(a) Velocity increases
(b) Momentum increases
(c) Mass increases
(d) Velocity decreases
Q36. The atomic model proposed by Rutherford explains:
(a) Atomic stability
(b) Line spectrum
(c) Nuclear structure
(d) Chemical bonding
Q37. The energy of a photon is given by:
(a) hc/λ
(b) hλ
(c) c/λ
(d) λ/h
Q38. Nuclear fission is caused by:
(b) Electron bombardment
(c) Neutron bombardment
(d) Alpha particles
Q39. The SI unit of radioactivity is:
(a) Curie
(b) Becquerel
(c) Gray
(d) Sievert
Q40. The half-life of a radioactive substance depends on:
(a) Temperature
(b) Pressure
(c) External field
(d) Nature of nucleus
(a) Holes
(b) Protons
(c) Electrons
(d) Ions
Q42. The majority charge carriers in p-type semiconductor are:
(a) Electrons
(b) Holes
(c) Neutrons
(d) Ions
Q43. A diode allows current to flow mainly in:
(a) Both directions
(b) Reverse direction
(c) Forward direction
(d) No direction
Q44. Zener diode is mainly used as:
(a) Rectifier
(b) Oscillator
(c) Voltage regulator
(d) Amplifier
Q45. Logic gate AND gives output 1 when:
(a) Any input is 1
(b) All inputs are 1
(c) All inputs are 0
(d) One input is 0
Q46. The unit of resistivity is:
(a) Ohm
(b) Ohm m
(c) Ohm m⁻¹
(d) Ohm m²
Q47. The temperature coefficient of resistance of metals is:
(a) Zero
(b) Negative
(c) Positive
(d) Infinite
Q48. The function of fuse wire is based on:
(a) Magnetic effect
(b) Heating effect
(c) Chemical effect
(d) Photoelectric effect
Q49. An ideal voltmeter has:
(a) Zero resistance
(b) Infinite resistance
(c) Low resistance
(d) High current
Q50. An ideal ammeter has:
(a) High resistance
(b) Infinite resistance
(c) Zero resistance
(d) Variable resistance
Answer Key
| Q.No | Ans | Q.No | Ans | Q.No | Ans | Q.No | Ans | Q.No | Ans |
|---|---|---|---|---|---|---|---|---|---|
| 1 | (c) | 11 | (c) | 21 | (c) | 31 | (b) | 41 | (c) |
| 2 | (b) | 12 | (b) | 22 | (c) | 32 | (b) | 42 | (b) |
| 3 | (b) | 13 | (c) | 23 | (c) | 33 | (b) | 43 | (c) |
| 4 | (c) | 14 | (d) | 24 | (a) | 34 | (a) | 44 | (c) |
| 5 | (a) | 15 | (c) | 25 | (b) | 35 | (d) | 45 | (b) |
| 6 | (b) | 16 | (b) | 26 | (b) | 36 | (c) | 46 | (b) |
| 7 | (c) | 17 | (c) | 27 | (b) | 37 | (a) | 47 | (c) |
| 8 | (c) | 18 | (c) | 28 | (a) | 38 | (c) | 48 | (b) |
| 9 | (c) | 19 | (a) | 29 | (b) | 39 | (b) | 49 | (b) |
| 10 | (a) | 20 | (b) | 30 | (a) | 40 | (d) | 50 | (c) |
JAC Class XII Chemistry Model Practice Paper 2026 | Complete Question Paper (Sections A–D) | New Pattern
CBSE Class XII Chemistry Model Practice Paper 2026: Complete Question Paper (All Sections A–E)
JAC Board Class XII Physics: Very Short Answer Type Guess Questions
JAC Board Class XII Physics: Most Important Guess Questions (Long Answer Type)