PU CET UG 2026 Question Paper Physics

FOR PU CET UG EXAM PREPARATION

PU CET UG 2026
Question Paper ·
Physics
EXAM YEAR TYPE SUBJECT

PU CET UG 2026 Question Paper Physics

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as 1. Write the dimensions of 𝑎 in the relation, 𝑃 =
a g [CET-UG UG-PHY2026] - A
; where, 𝑃 is power, 𝑥 the distance and 𝑡
the time.
(A) [L2] (B) [ML2] (C) [M-1T2] (D) [M-1LT2]
2. In an experiment, four quantities 𝛼, 𝛽, 𝛾 and Ꝭ are measured with percentage error 1%, 2%,
3% and 4%, respectively. Quantity 𝑃 is calculated as follows 𝑃 = %, error in 𝑃 is
Ꝭ
(A) 14 % (B) 18 % (C) 7 % (D) 4 %

m
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3. The velocity of the particle is 𝑣= 6𝚤̂ + 2𝚥̂ − 2𝑘. The component of the velocity
veloci parallel to a

.c e m
vector a = 𝚤̂ + 𝚥̂ + 𝑘 in vector form is

e m
(A) 6𝚤̂ + 2𝚥̂ + 2𝑘 (B) 2𝚤̂𝚤̂ + 2𝚥̂ + 2𝑘 (C) 𝚤̂ + 𝚥̂ + 𝑘 (D) 6𝚤̂ + 2𝚥̂
2 − 2𝑘

l a s
l a s
4. A particle is moving such that s = t3 – 3t2 + 12t + 7, where s is in metre and t is in second.
ag
ag
The minimum velocity attained by the particle
(A) 29 ms-1 (B) 9 ms-1 (C) 6 ms-1 (D) 12 ms-1
5. An electron of mass m and a photon have same energy E.. The ratio of de-Broglie
de
wavelengths associated withh them is ((c being velocity of light)
/ / /
(A) (B) 𝑐 (2𝑚𝐸 ) / (C) (D)

6. The magnetic moment of an electron orbiting in a circular orbit of radius r with a speed v is
equal to

m
co
(A) (B) 𝑒𝑣𝑟 (C) (D) None
one of these

.
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7. According to Malus’s Law,, the intensity I of plane-polarized
polarized light transmitted through an

a s
analyzer is given by (I0 = intensity of incident polarized light, I = transmitted intensity after

g l
passing through analyzer, θ = angle between the transm
transmission
ission axes of polarizer and analyzer)

a
2 2
(A) I = I0 sin θ (B) I = I0 cos θ (C) I = I0 tan2θ (D) I = I0 (1 + cos2θ)
8. The weight w (as shown in figure) is 80.0 N. What is the tension in the diagonal string?

m
m c. o
c. o s e m
s em (D)a 40/√
l
la ag
(A) 80√2 (B) 80
80/√2 (C) 40√2 √2

ag 9. Which statement(s) is (are) true.
(i) Work done by conservative force in moving a body from one position to another
depends only on the initial and final positions of the body.
(ii) Work done by conservative force depends upon the nature of the path followed by
the body in going from initial position to the final position.
(iii) Work done by or against a conservative force in moving a particle along a closed
path (round trip) is zero
zero.
(A) i & ii (B) i & iii (C) ii & iii (D) All of these

m . c
c. o m
(1)

m s e
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10. The potential energy for a conservative force system is given by
U = 𝑥 − 3𝑥
The potential energy at equilibrium is
(A) +(9/14) units (B) - (9/14) units (C) +(13/2) units (D) - (13/2) units
11. A long spring is stretched by 2 cm. Its potential energy is U. If the spring is stretched by
10 cm, its potential energy would be
(A) U/25 (B) U/5 (C) 5U (D) 25U
12. The half-life of a radioactive substance is 20 min. The time (in min) taken between 60%
decay and 80% decay of the same radioactive substance is
(A) 15 (B) 20 (C) 45 (D) 60
13. A hemispherical bowl of radius R is rotating about its axis of symmetry which is kept
vertical. A small ball kept in the bowl rotates with the bowl without slipping on its surface.
If the surface of the bowl is smooth and the angle made by the radius through the ball with
the vertical is α. Find the angular speed (ω) at which the bowl is rotating.
/ / /
(A) ω = (B) ω = (C) ω = (D) ω =

14. A stone is attached to one end of a string and rotated in a vertical circle. If string breaks at
the position of maximum tension, it will break at

(A) A (B) B (C) C (D) D
15. The moment of inertia of a hollow cylinder of mass m, inner radius R₁, and outer radius R₂
about its symmetry axis is given by
(A) 𝑚(𝑅 − 𝑅 ) (B) 𝑚(𝑅 + 𝑅 )
(C) 𝑚(𝑅 𝑅 ) (D) 𝑚( )

16. A planet moving around sun sweeps area A1 in 4 days, A2 in 8 days and A3 in 6 days, then
find the relation between A1, A2 and A3.
(A) 3A1 = 2A2 = A3 (B) 6A1 = 3A2 = 8A3
(C) A1 = A2 = A3 (D) 6A1 = 3A2 = 4A3
17. If gravitational potential is V = xy2, find the gravitational field at (2, 1).
(A) |E| = √2unit (B) |E| = √25 unit (C) |E| = √10unit (D) |E| = √17unit
18. A spring mass system is hanging from the ceiling of an elevator in equilibrium. The elevator
suddenly starts accelerating upwards with acceleration a, find the amplitude of the resulting
SHM.
( ) ( )
(A) (B) (C) (D)

(2)

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as ag
19. Relation between orbital velocity (vo) and escape velocity (ve) can be expressed as
(A) ve = vo (B) ve = √2 vo (C) ve = √3 vo (D) vo= √2 ve
20. Reason of weightlessness in a satellite is
(A) Zero gravity (B) No atmosphere
(C) Zero reaction force by satellite surface (D) None of these
21. A radioactive nucleus of mass 𝑀 emits a photon of frequency 𝜈 and the nucleus recoils. The

m
co
recoil energy will be

.c om(B) Zero m .
ℎ

e
(A) (C) ℎ𝜈 (D) 𝑀𝑐 − ℎ𝜈

e m l a s
s g
22. Bernoulli’s theorem is expressed as (where 𝑃 is the pressure, 𝑣 is the velocity, ℎ is the height,

l a
(A)g𝑃 − 𝜌𝑣 + 𝜌𝑔ℎ = 𝑐𝑜𝑛𝑠𝑡𝑎𝑛𝑡
and 𝜌 is the density of the fluid.)
a
a
(C) 𝑃 + 𝜌𝑣 + 𝜌𝑔ℎ = 𝑐𝑜𝑛𝑠𝑡𝑎𝑛𝑡
(B) 𝑃 + 𝜌𝑣 + 𝜌𝑔ℎ = 𝑐𝑜𝑛𝑠𝑡𝑎𝑛𝑡
(D) 𝑃 + 𝜌𝑔ℎ = 𝑐𝑜𝑛𝑠𝑡𝑎𝑛𝑡

23. If for the same range, the two heights attained are 20 meters and 80 meters, then the range
will be
(A) 20 meters (B) 40 meters (C) 120 meters (D) 160 meters
24. In anomalous expansion of water, at what temperature, the density of water is maximum?

m
(A) 4o C (B) < 4o C (C) > 4o C (D) 10o C

. co
25. Relation between mean free path (𝑙), temperature (𝑇), pressure (𝑝) and diameter of each
molecule (𝑑) is
em
s (C) 𝑙 =
(A) 𝑙 = (B) 𝑙 =
g l a (D) 𝑙 =

a
√ √ √ √

26. At 27°C temperature, the kinetic energy of an ideal gas is E1. If the temperature is increased
to 327°C, then the kinetic energy will be
(A) (B) √2𝐸 (C) (D) 2𝐸
√

27. Zener diode is used for
(A) Amplification (B) Rectification
(C) Voltage regulation (D) Produce oscillation in an oscillator

m
m c. o
28. Three identical rods have been joined at a junction to make it a Y shape structure. If two free

c. o m
ends are maintained at 40°C and the other end is at 10°C, then what is the junction

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temperature T?

s g l
la
(A) 22.5o C (B) 30o C (C) 45o C (D) 0o C

g a
a
29. Wien’s displacement law is expressed as
(A) λ T = constant
max (B) λ /T = constant max
4
(C) E = hν (D) T = σA
30. A soap film of refractive index n and thickness t is illuminated by white light at near-normal
incidence. For constructive interference in the reflected light, the condition is
(A) 2𝑛𝑡 = 𝑚𝜆 (B) 2𝑛𝑡 = (𝑚 + )𝜆 (C) 2𝑡 = 𝑚𝜆 (D) 𝑛𝑡 = 𝑚𝜆

m . c
c. o m
(3)

m s e
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31. Two identical spheres with mass 𝑚 are hung from silk threads of length 𝐿. The spheres have
the same charge, so 𝑞 = 𝑞 = 𝑞. The radius of each sphere is very small compared to the
distance between the spheres, so they may be treated as point charges. Show that if the angle
𝜃 is small, the equilibrium separation d between the spheres is (consider small angle
approximation)
/ /
(A) 𝑑 = (B) 𝑑 = (C) 𝑑 = (D) 𝑑 =

32. The electric field (𝐸) due to an infinitely long straight uniformly charged wire with linear
charge density 𝜆 at a distance 𝑟 from it is:
(A) 𝐸 = (B) 𝐸 = (C) 𝐸 = (D) 𝐸 =

33. Field lines and equipotential surfaces are always
(A) Parallel to each other (B) Mutually perpendicular
(C) Inclined at 45° (D) Randomly oriented
34. A charged particle of charge 𝑞 and mass 𝑚 enters a uniform magnetic field B with velocity
𝑣 perpendicular to the field. The path of the particle will be
(A) Straight line (B) Circular path (C) Parabolic path (D) Helical path
35. When a capacitor charges in a series LCR circuit, the charge on the capacitor at time 𝑡 is
given by (𝑞 = instantaneous charge on the capacitor at time 𝑡, 𝑄 = initial charge on the
capacitor, 𝑅 = resistance of the circuit, 𝐿 = inductance of the coil, 𝐶 = capacitance of the
capacitor, 𝜔 = angular frequency of damped oscillation, 𝜑 = phase constant, 𝑡 = time)
(A) 𝑞 = 𝑄 𝑒 cos (𝜔𝑡 + 𝜑) (B) 𝑞 = 𝑄 𝑒
(C) 𝑞 = 𝑄 sin 𝜔𝑡 (D) 𝑞 = 𝑄 𝑒 cos(𝜔𝑡 + 𝜑)
36. A parallel plate capacitor with air as dielectric has capacitance 𝐶 . When a dielectric slab of
thickness 𝑡 and dielectric constant 𝐾 is inserted between the plates (plate separation = 𝑑),
the new capacitance becomes
( )
(A) 𝐶 = (B) 𝐶 = (C) 𝐶 = (D) 𝐶 = 𝐾𝐶
( ) ( )

37. The wettability of a surface by a liquid depends primarily on
(A) Viscosity
(B) Surface tension of liquid and air
(C) Density
(D) Angle of contact between the surface and the liquid
38. Equal currents are passing through two very long and straight parallel wires in the same
direction. They will
(A) Attract each other (B) Repel each other
(C) Lean towards each other (D) Neither attract nor repel each other
39. A wire of length L metre carrying a current I ampere is bent in the form of a circle. The
magnitude of the magnetic moment is
(A) (B) (C) (D)

(4)

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co m .
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as 40. What are eddy currents? ag

(A) Currents induced in a conductor due to change in magnetic flux
(B) Currents flowing only in superconductors
(C) Currents flowing through an inductor in an AC circuit
(D) Direct currents used to produce a magnetic field
41. Curie’s Law states that the magnetic susceptibility (χ) of a paramagnetic material is

m
co
(A) Directly proportional to the absolute temperature T

om .
(B) Inversely proportional to the absolute temperature T

.c e m
s
(C) Independent of temperature

e m
(D) Proportional to T2
l a
l a s wavelength of a neutron at 27°C is λ. What will be its wavelength at 927°C?
ag
(A)gλ/2
42. The de-Broglie

a The ferromagnetic substances do not obey Curie’s law.
43. I.
(B) λ/3 (C) λ/4 (D) λ/9

II. At Curie point, ferromagnetic substances start behaving as a paramagnetic substances.
Which of the following statement(s) is/are correct?
(A) only I (B) only II (C) both I & II (D) None of these
44. The Poynting vector represents
(A) The direction of magnetic field
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(B) The rate of energy loss in a resistor
.
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(C) The rate of flow of electromagnetic energy per unit area

a s
(D) The electric flux through a surface

g l
a
45. The speed of electromagnetic waves in vacuum is equal to
(A) 𝜇 𝜀 (B) 𝜇 𝜀 (C) (D)

46. If immiscible liquids of refractive indices μ1, μ2 and μ3 (with μ3>μ2>μ1) are filled in a vessel.
Their depths are d1, d2 and d3, respectively. Then, the apparent depth (for normal incidence)
when seen from top of the first liquid will be
(A) + + (B) + −

m
(C) − − (D) − +

m c. o
c. o m
47. In the hydrogen atom, when an electron jumps from n2=4 to n1=3, the wavelength of emitted

s e
em 48. In Young’s double slit experiment, the fringe width is β. If entiregarrangement
photon lies in

s
(A) Lyman series (B) Balmer series
l a
(C) Paschen series (D) Pfund series

gla a is placed in a
a liquid of refractive index n, then the fringe width becomes
(A) (B) 𝑛𝛽 (C) (D)

49. The Brewster angle (ib ) at the interface between two media of refractive indices 𝑛 and 𝑛 is
given byfor an interface should be
(A) sin 𝑖 = (B) cos 𝑖 = (C) tan 𝑖 = (D) tan 𝑖 =

m . c
c. o m
(5)

m s e
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50. According to Einstein’s photoelectric equation, the energy of an incident photon is used to
(A) Create magnetic fields inside the metal
(B) Release an electron and give it kinetic energy
(C) Increase the temperature of the surface
(D) Reflect light from the metal surface
51. The wave–particle duality of matter is mathematically expressed by
(A) E=mc2 (B) λ=h/p (C) E=hν (D) p=mv2
52. The maximum kinetic energy of the photoelectrons depends only on
(A) Charge of the particle (B) Frequency of incident light
(C) Angle of incidence (D) Intensity of the incident light
53. The potential energy of an electron in an atomic orbit due to electrostatic attraction by the
nucleus is given by (U = potential energy of the electron, Z = atomic number, e = charge of
the electron, r = radius of the orbit, ε0 = permittivity of free space)
(A) 𝑈 = (B) 𝑈 = − (C) 𝑈 = 𝑚𝑣 (D) 𝑈 = − 𝑚𝑣

54. Which one of the series of hydrogen spectrum is in the visible region?
(A) Lyman series (B) Balmer series (C) Paschen series (D) Brackett series
55. The condition for constructive interference in X-ray diffraction is given by
(A) 2𝑑 sin 𝜃 = 𝑛𝜆 (B) 𝑑 cos 𝜃 = 𝑛𝜆 (C) 2𝑑 = 𝑛𝜆 sin 𝜃 (D) 𝑑 = 𝑛𝜆 cos 𝜃
56. Heavy water is used as moderator in a nuclear reactor. The function of the moderator is
(A) to control the energy released in the reactor
(B) to start the fusion
(C) to cool the reactor factor
(D) to slow down the neutron of thermal energies
57. β-decay means emission of electrons from
(A) Innermost electron orbit (B) A stable nucleus
(C) Outermost electrons orbit (D) Radioactive nucleus
58. Match the symbol of diode given in Column I to the result given in Column II and mark the
correct option from the codes given below.

A B C
(A) q r p
(B) q p r
(C) r p q
(D) p q r
(6)

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59. The increase in the width of the depletion region in a p-n junction diode is due to
(A) reverse bias only (B) both forward bias and reverse bias
(C) increase in forward current (D) forward bias only
60. According to Lenz’s Law, the direction of the induced emf or current in a closed circuit is
such that
(A) It aids the change in magnetic flux producing it.

m
(B) It opposes the change in magnetic flux producing it.

om . co
(C) It remains constant irrespective of magnetic flux change

c m
(D) It depends only on the resistance of the circuit.

m . x-x-x
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s e
(ROUGH WORK)
g l a
l a a
ag

m
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s em
g l a
a

m
m c. o
c. o s e m
s em la
gla ag
a

m . c
c. o m
(7)

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(ROUGH WORK)

(8)

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as (ROUGH WORK) ag [CET-UG-PHY2026] - A

m
om . co
.c e m
e m l a s
l a s a g
ag

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s em
g l a
a

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c. o s e m
s em la
gla ag
a

m . c
c. o m
(9)

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(ROUGH WORK)

(10)

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