HP Board 12th Class Model Question Paper 2025 Physics

HPBOSE
MODEL QUESTION
PAPERS

CLASS: XII
MODEL QUESTION PAPER (HPBOSE) 2024-25
SUBJECT PHYSICS (THEORY)
MAXIMUM MARKS : 60 TIME ALLOWED : 3HOURS
General Instructions:
(1) There are 27 questions in all. All questions are compulsory.
(2) This question paper has five sections: Section A, Section B, Section C, Section D and
Section E.
(3) All the sections are compulsory.
(4) Section A contains twelve MCQ’s and Assertion Reasoning based questions of 1 mark
each, Section B contains four questions of two marks each, Section C contains seven
questions of three marks each, Section D contains one case study based questions of four
marks and Section E contains three long answer questions of five marks each.
(5) There is no overall choice. However, an internal choice has been provided in one question
in Section B, one question in Section C, one question in each CBQ in Section D and all three
questions in Section E. You have to attempt only one of the choices in such questions.
(6) Use of calculators is not allowed.
(7) You may use the following values of physical constants where ever necessary

SECTION-A (MULTIPLE CHOICE QUESTIONS)
1. The unit of electric field intensity is:
a) Volt
b) Ohm
c) Newton per Coulomb
d) Joule per Coulomb
2. In a parallel circuit, the voltage across each component is:
a) Different
b) Zero
c) Same
d) Averaged
3. The force on a moving charge in a magnetic field is maximum when the angle
between the velocity and the magnetic field is:
a) 0°
b) 90°
c) 45°
d) 180°
4. The root mean square (RMS) value of an AC current is:
a) Equal to the peak value
b) Half of the peak value
c) The effective value for power calculation
d) Twice the peak value

5. The self-inductance of a coil is:
a) Inversely proportional to the number of turns
b) Directly proportional to the number of turns
c) Independent of the number of turns
d) Inversely proportional to the coil's area
6. The phenomenon of light bending around obstacles is called:
a) Refraction
b) Diffraction
c) Reflection
d) Dispersion
7. A concave lens is used to correct:
a) Hyperopia
b) Myopia
c) Astigmatism
d) Presbyopia
8. The wavelength of an electron is inversely proportional to its:
a) Speed
b) Energy
c) Momentum
d) Charge
9. In a nuclear fission reaction, the total mass of the products compared to the
reactants is:
a) Greater
b) Less
c) Equal
d) Cannot be determined
10. In a P-N junction diode, the region where no current flows is known as:
a) Conducting region
b) Depletion region
c) Accumulation region
d) Neutral region

For quations 11 and 12, two statements are given- one labelled Assertion (A) and
other lebelled Reason (R). Select the correct answer to these questions from the
options given below.
a) Both Assertion and Reason are true, and Reason is the correct explanation.
b) Both Assertion and Reason are true, but Reason is not the correct
explanation.
c) Assertion is true, but Reason is false.
d) Assertion is false, but Reason is true.

11. The Assertion (A): A charged particle moving in a magnetic field experiences a force
that is always perpendicular to its velocity.
Reason (R): The magnetic force on a moving charge is given by F=q (v×B), where v
is the velocity of the charge and B is the magnetic field.
12. Assertion (A): The current through a PN diode increases exponentially with the
applied forward voltage.
Reason (R): In a PN diode, the majority carriers move across the junction, and their
movement is governed by the exponential relationship in the diode equation.

SECTION-B (VERY SHORT ANSWER)
13. Define drift velocity? Show that 𝑰 = 𝒏𝒆𝑨𝒗𝒅 , where symbols have their usual
meanings.
14. Discuss domain theory of ferromagnetism.
15. Explain the photoelectric effect and derive the equation for the kinetic energy of the
emitted photoelectrons.
16. A circular coil of wire consisting of 100 turns, each of radius 8.0 cm carries a current
of 0.40 A. What is the magnitude of the magnetic field B at the centre of the coil?
OR
Write the formula for the power factor in an AC circuit and its significance.

SECTION-C (SHORT ANSWER)

17. Discuss the concept of mutual induction, including its physical basis, and derive the
expression for the induced electromotive force (emf) in a coil due to a changing
current in a nearby coil.
18. Explain the phenomenon of diffraction of light and describe how it differs from
interference.
19. Define Binding energy and derive an expression for mass defect.
20. Two charges, q1 and q2, are placed 12 meters apart. The force between them is
5×10−2Newtons. If q1 is +4 μC and q2 is unknown, find the magnitude of q2.
21. What is displacement current? Find its expression.
22. Explain Ohm's Law and derive the expression for the power dissipated in a resistor.
23. State Bohr’s postulates of the hydrogen atom and explain how they help in
determining the energy levels of the atom.

SECTION-D: CASE STUDY-BASED QUESTION
24. Read the following source and answer any four out of the following questions:
The potential at any observation point P of a static electric field is defined as the work
done by the external agent (or negative of work done by electrostatic field) in slowly
bringing a unit positive point charge from infinity to the observation point. Figure
shows the potential variation along the line of charges. Two point charges Q1 and
Q2 lie along a line at a distance from each other.

(i) At which of the points 1, 2 and 3 is the electric field is zero?
(a) 1 (b) 2 (c) 3 (d) Both (a) and (b)
(ii) The signs of charges Q1 and Q2 respectively are
a) positive and negative
b) negative and positive
c) positive and positive
d) negative and negative
(iii) Which of t he two charges Q1 and Q2 is greater in magnitude?

(a) Q2 (b) Q1 (c) Same (d) Can't determined
(iv) Which of the following statement is not true?
(a) Electrostatic force is a conservative force
(b) Potential energy of charge q at a point is the work done per unit charge in
bringing a charge from any point to infinity
(c) When two like charges lie infinite distance apart, their potential energy is zero.

SECTION-E

25. A convex lens of focal length 20 cm is used to form an image of an object placed 30
cm away from the lens. (a) Determine the position of the image formed. (b) Calculate
the magnification of the lens. (c) If the image is to be projected onto a screen, how far
should the screen be placed from the lens to get a sharp image?
OR
Discuss the formation of images by a convex lens. Include in your discussion:
(a) The lens formula and magnification formula.
(b) The nature and position of the image formed for different object distances
(i.e., when the object is at infinity, at 2F, Between F and 2F).

26. Explain the electrical conduction mechanism in semiconductors. Discuss the concept
of energy bands and the band gap in semiconductors. Also give difference between
intrinsic and extrinsic semiconductors.

27. Discuss the behavior of an LCR series circuit when connected to an AC source.
Define resonance and describe the condition for resonance in an LCR series circuit.
Explain the effect of resonance on impedance and current.
OR
An AC circuit has a sinusoidal voltage source with an amplitude of V0=100 V and a
frequency of 50 Hz. The current through the circuit is also sinusoidal and has an
amplitude of I0=5A.
(a) Calculate the average current over one complete cycle of the AC waveform.
(b) Determine the RMS value of the current.

BLUE PRINT OF PHYSICS MODEL PAPER SESSION 2024-25

NO. OF QUESTIONS OF
CHAPTER NAME 1 marks 2 Mark 3 Mark 4 Mark 5 Mark Total Marks Clubbing
for flexibility
Electric Charge and 1 --- 1 --- --- 4
Fields
Electrostatic Potential --- --- --- 1 --- 4 14
and Capacitance
Current Electricity 1 1 1 --- --- 6
Moving Charges and 2 1 --- --- --- 4
Magnetism
6
Magnetism and --- 1 --- --- --- 2
Matter
Electromagnetismc and 1 --- 1 --- --- 4
Induction
Alternating Current 1 --- --- --- 1 6 13
Electromagnetic --- --- 1 --- --- 3
waves
Ray optics and 1 --- --- --- 1 6
Optical Instruments 10
Wave optics 1 --- 1 --- --- 4
Dual Nature of 1 1 --- --- --- 3
Radiation and matter
10
Atoms --- --- 1 --- --- 3
Nuclei 1 --- 1 --- --- 4
Semiconductor 2 --- --- --- 1 7
7
Electronics
TOTAL 12 8 21 4 15 60 60

WEIGHTAGE OF OBJECTIVES:

OBJECTIVES WEIGHTAGE MARKS
KNOWLEDGE 37% 22
UNDERSTANDING 27% 16
APPLICATION 16% 10
HOTS 20% 12

SH. ABHINAV CHAND, LECTURER PHYSICS, GSSS CHACHIAN

DR. VIKAS NANDA, LECTURER (SN) PHYSICS, GSSS SOLDHA

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