Karnataka 2nd PUC Model Question Paper 2027 for Physics

FOR KARNATAKA 2ND PUC EXAM PREPARATION

Karnataka 2nd PUC
2027
Sample Paper ·
Physics
EXAM YEAR TYPE SUBJECT

Karnataka 2nd PUC 2027 Sample Paper Physics

Notes · Sample Papers · Previous Year Papers · Mock Tests

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GOVERNMENT OF KARNATAKA
KARNATAKA SCHOOL EXAMINATION AND ASSESSMENT BOARD
6TH CROSS, MALLESHWARAM, BENGALURU - 560003
2026-27 II PUC MODEL QUESTION PAPER-1
SUBJECT: PHYSICS (33) MAXIMUM MARKS: 70
TIME: 3 HOURS NUMBER OF QUESTIONS: 45
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General Instructions:
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1. All parts (A TO D) are compulsory.
2. For Part – A questions, only first written-answer will be considered for evaluation.
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3.
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Answers without relevant diagram / figure / circuit wherever necessary will not carry any marks.
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4.
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Direct answers to numerical problems without relevant formula and detailed solutions will not carry any marks.

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I. Pick the correct option among the given options for ALL of the following
questions: 15 × 1 = 15
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1. The electric flux over a closed surface enclosing a charged particle is − 𝟔𝜺 . The charge of the
𝒐

particle is:
𝑞 𝑞

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(a) + (b) +6𝑞 (c) − (d) −6𝑞
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2. Two capacitors of capacitance C1 and C2 (C1 ≠ C2) are connected in parallel to an external source
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of potential difference V. The equation which is not applicable for the given combination is
(Symbols have their usual meanings): g
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(a) Q = Q1 + Q2 (b) V = V1 + V2 (c) C = C1 + C2 (d) V1 = V2
3. In case of metals, with increase in temperature:
(a) the conductivity decreases. (b) the average speed of conduction electrons decreases.
(c) the resistivity decreases. (d) the number of conduction electrons increases.
4. A galvanometer can be converted into a voltmeter by connecting:

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(a) a low resistance in series with it.
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(b) a high resistance in parallel with it.
(d) a high resistance in series with .it.
c. low resistance in parallel with it. e m
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column-II is the list of an

l a item related to magnetic property. Identify the correct match. ag
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(i) Paramagnetism (p) Magnetic property common to all substances.
(ii) Diamagnetism (q) Domain formation
(iii) Ferromagnetism (r) Sodium is an example for this magnetic property.

(a) (i) → (q), (ii) → (r), (iii) → (p) (b) (i) → (r), (ii) → (q), (iii) → (p)
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(c) (i) → (r), (ii) → (p), (iii) → (q) (d) (i) → (p), (ii) → (q), (iii) → (r)
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2026-27 PHYSICS MQP - 1 Page 1

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6. Magnetic flux is:
(a) a scalar quantity and its SI unit is Wb m-2. (b) a scalar quantity and its SI unit is Wb.
(c) a vector quantity and its SI unit is Wb m-2. (d) a vector quantity and its SI unit is Wb.
7. The resonant frequency of a series LCR ac circuit remains constant even if there is any variation
in the value/values of:
(a) only L (b) only C (c) both L and R (d) only R
8. Electromagnetic waves are produced by:
(a) charges in uniform motion . (b) stationary charges.
(c) accelerated charges. (d) steady current flowing through a conductor.
9. A real object is placed between the pole and principal focus of a concave mirror. The image
formed is:
(a) virtual and magnified. (b) real and magnified.
(c) virtual and diminished (d) real and diminished
10. The waves coming from two coherent sources overlap at a point to give maximum intensity. The
phase difference between the superposing waves may be:
(a) 3π (b) 6π (c) 5π (d) 7π
11. Identify the correct statement.
(a) Light waves exhibit diffraction but not sound waves.
(b) Sound waves exhibit diffraction but not light waves.
(c) Light waves exhibit diffraction but not polarization.
(d) Light waves exhibit both diffraction and polarization.
12. In a photoelectric experiment, the graph related to two quantities is a straight-line with slope
𝒉
equal to . It is a graph of:
𝒆

(a) kinetic energy of photoelectrons versus intensity of incident light.
(b) photoelectric current versus intensity of incident light.
(c) stopping potential for photoelectrons versus frequency of incident light.
(d) photoelectric current versus collector plate potential.
13. The total energy of an electron revolving in nth orbit of hydrogen atom is the least for:
(a) n = 3 (b) n = 1 (c) n = 2 (d) n = 4
14. An example for isobars is:
(a) 21𝐻 and 31𝐻 (b) 21𝐻 and 42𝐻𝑒 (c) 198 197
80𝐻𝑔 and 79𝐴𝑢 (d) 31𝐻 and 32𝐻𝑒
15. When a p-n junction diode is reverse biased:
(a) both the barrier height and width of depletion region increase.
(b) the barrier height increases but the width of depletion region decreases.
(c) the barrier height decreases but the width of depletion region increases.
(d) both the barrier height and the width of depletion region decrease.

2026-27 PHYSICS MQP - 1 Page 2

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c. II.o Fill in the blanks by choosing the appropriate answersegiven
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se ALL the following questions: ag 5×1=5

[90°, magnitude, magnetization, work function, 0°, polarity]
16. The net magnetic moment acquired per unit volume of a sample is called ____________.
17. Lenz’s law gives the ____________ of the induced emf.
18. The phase difference between voltage and current in a purely resistive AC circuit is ___________.
19. If the angle of incidence for a ray of light in denser medium is equal to critical angle, then the angle of
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refraction in rarer medium is equal to___________.
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20. The minimum energy required by an electron to escape from the metal surface is called__________.
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s em PART – B
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g laFIVE of the following questions: 5a
III. Answer any
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21. Define electric field at a point. What is meant by ‘source charge’?
× 2 = 10

22. The electrostatic potential energy of a system of two like charges is positive. Explain.
23. Name the mobile charge carriers in metals. Write the expression for mobility in terms of average
collision time (relaxation time) for charge carriers.
24. What is the nature of the force between two parallel conductors carrying currents in the
(a) same direction and
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(b) opposite directions?

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25. Calculate the magnetic energy stored in a coil of self – inductance 0.05 H carrying a current of 0.2 A.
26. Name the electromagnetic waves used in:
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(a) Remote switches of TV sets.
g a laser assisted eye surgery (LASIK).
(b) lThe
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27. Give two limitations of Bohr’s atomic model.
28. List out two differences between p-type and n-type semiconductors.
PART – C
IV. Answer any FIVE of the following questions: 5 × 3 = 15
29. Derive an expression for torque acting on an electric dipole placed in a uniform electric field.

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30. What is a capacitor? Mention two factors on which capacitance of a parallel plate capacitor depends.

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31. In a chamber,
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. a speed of 4.8 × 10 m s normal to the field. Determine the radius of thesecircular orbit.
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e Given: e = 1.6 × 10 C and m = 9.1 × 10 kg.
with
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–19 –31

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a 33. Describe the coil and bar magnet experiment to demonstrate the phenomenon of electromagnetic
induction.
34. Draw the ray diagram for the formation of image by a compound microscope. Write the expression for
linear magnification produced by the objective of compound microscope in terms of its tube length.
35. What are matter waves? Explain de Broglie hypothesis of matter waves.

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36. Differentiate between nuclear fission and nuclear fusion.
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2026-27 PHYSICS MQP - 1 Page 3

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PART – D
V. Answer any THREE of the following questions: 3 × 5 = 15
37. Derive an expression for electric potential at a point due to a point charge.
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38. Assuming the expression for drift velocity, derive the expression for conductivity of a material σ =
m
where symbols have their usual meanings.
39. Derive an expression for the magnetic field at a point on the axis of a circular current loop using
Biot-Savart law.
40. (i) What is a wavefront? (1)
(ii) Using Huygens principle, derive Snell’s law for a plane wave undergoing refraction. (4)
41. What is a half-wave rectifier? Draw a neat, labelled circuit diagram and input-output waveforms for half-
wave rectifier. Explain the working of a half-wave rectifier.

VI. Answer any TWO of the following questions: 2 × 5 = 10
42. A positively charged spherical conductor of radius 0.1 m produces an electric field of 1.8 × 10 3 N C-1 at a
point ‘P’ distant 0.2 m from its centre. Calculate the magnitude of the charge present on the spherical
conductor. Also find the new charge on the charged spherical conductor if 5 × 1010 more electrons are
removed from it.
43. The terminal potential difference of a cell connected to an external resistance of 4 Ω is 2.4 V. When the
same cell is connected to an external resistance of 9 Ω, the terminal potential difference becomes 2.7 V.
Calculate the emf and internal resistance of the cell.
44. A resistor of 10 Ω and an inductor of self-inductance 0.05 H are connected in series to a 200 V, 50 Hz
AC source. Calculate the impedance of the circuit and current in the circuit.
45. Double convex lenses with both surfaces of the same radius of curvature are to be manufactured from
glass of refractive index 1.55. Find the radius of curvature required if the focal length is to be 20 cm.
Also find the focal length of the lens if it is immersed in water of refractive index 1.33.

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2026-27 PHYSICS MQP - 1 Page 4

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