CUET UG 2024 / Physics

CUET UG 2024 Physics Previous Year Solved Paper

CUET UG 2024 Physics previous year paper with easy solutions. This page keeps the original questions and presents student-friendly explanations in a clean table format for quick revision, practice, and topic-wise mock preparation.

Subject: Physics
Year: 2024
Questions extracted: 50
Source format: previous year paper with solution section

Student-Friendly Solutions Table

Each question is shown with its original wording from the source paper and an easier explanation designed for quick understanding.

Q.No. Question Easy Solution
1 In an electromagnetic wave, the ratio of energy densities of electric and magnetic fields is
Options:
A. 1:1
B. 1:c
C. c:1
D. 1:c^2		 Option A Option A is correct from the relevant magnetic field or induction principle.
2 Match List-I (graphs showing variation of opposition to flow of ac versus frequency) with circuit characteristic in List-II.






List-I (Graphs)List-II (Characteristic)
(A) Constant opposition vs frequency(I) Impedance
(B) Linear increase (y ∝ x)(II) Capacitive reactance
(C) Inverse relation (y ∝ 1/x)(III) Inductive reactance
(D) Hyperbolic curve with minimum(IV) Resistance

Options:
A. (A)-(I), (B)-(II), (C)-(III), (D)-(IV)
B. (A)-(IV), (B)-(III), (C)-(II), (D)-(I)
C. (A)-(I), (B)-(II), (C)-(IV), (D)-(III)
D. (A)-(III), (B)-(IV), (C)-(I), (D)-(II)		 Option B Option B gives the correct matching of concepts and physical quantities.
3 Of the following, the correct arrangement of electromagnetic spectrum in decreasing order of wavelength is
Options:
A. Radio waves, X-rays, Infrared waves, microwaves, visible waves
B. Infrared waves, microwaves, Radio waves, X-rays, visible waves
C. Radio waves, microwaves, Infrared waves, visible waves, X-rays
D. X-rays, visible waves, Infrared waves, microwaves, Radio waves		 Option C Option C follows the correct wave relation or spectrum order.
4 Match Electromagnetic waves listed in column I with Production method/device in column II.






Column-I (Electromagnetic waves)Column-II (Production method/device)
(A) Microwaves(I) LC oscillator
(B) Infrared(II) Magnetron
(C) X-rays(III) Vibration atoms/molecules
(D) Radio waves(IV) Bombarding large atomic number metal target with fast moving electrons

Options:
A. (A)-(I), (B)-(II), (C)-(III), (D)-(IV)
B. (A)-(II), (B)-(III), (C)-(IV), (D)-(I)
C. (A)-(II), (B)-(I), (C)-(IV), (D)-(III)
D. (A)-(III), (B)-(IV), (C)-(I), (D)-(II)		 Option B Option B gives the correct matching of concepts and physical quantities.
5 In the figure given below, APB is a curved surface of radius of curvature 10 cm separating air and a transparent material (μ = 4/3). A point object O is placed in air on the principal axis of the surface 20 cm from P. The distance of the image of O from P will be
Options:
A. 16 cm left of P in air
B. 16 cm right of P in water
C. 20 cm right of P in water
D. 20 cm left of P in air		 Option D Option D is the correct answer according to the provided key.
6 For fixed values of radii of curvature of lens, power of the lens will be
Options:
A. P ∝ (μ - 1)
B. P ∝ μ^2
C. P ∝ 1/μ
D. P ∝ μ^-2		 Option A Option A is the correct answer according to the provided key.
7 The graph correctly representing the variation of image distance 'v' for a convex lens of focal length 'f' versus object distance 'u' is
Options:
A. A
B. B
C. C
D. D		 Option A Option A matches the standard graph behavior for this physics concept.
8 Using light from a monochromatic source to study diffraction in a single slit of width 0.1 mm, the linear width of central maxima is measured to be 5 mm on a screen held 50 cm away. The wavelength of light used is
Options:
A. 2.5 × 10^-7 m
B. 4 × 10^-7 m
C. 5 × 10^-7 m
D. 7.5 × 10^-7 m		 Option C Option C follows the correct wave relation or spectrum order.
9 Radiation of frequency 2ν0 is incident on a metal with threshold frequency ν0. The correct statement of the following is
Options:
A. No photoelectrons will be emitted
B. All emitted photoelectrons will have energy hν0
C. Maximum kinetic energy of photoelectrons emitted can be hν0
D. Maximum kinetic energy of photoelectrons emitted will be 2hν0		 Option C Option C follows the correct wave relation or spectrum order.
10 A point source causing photoelectric emission from a metallic plate is moved away from the plate. The variation of photoelectric current with distance from the source is correctly represented by the graph:
Options:
A. Linear increasing graph
B. Saturation curve
C. Inverse relation curve (I ∝ 1/d^2)
D. Linear decreasing graph		 Option C Option C matches the standard graph behavior for this physics concept.
11 A proton accelerated through a potential difference V has a de Broglie wavelength λ. On doubling the accelerating potential, de Broglie wavelength of the proton
Options:
A. remains unchanged
B. becomes double
C. becomes four times
D. decreases		 Option D Option D follows the correct wave relation or spectrum order.
12 The kinetic energy of an electron in ground level in hydrogen atom is K units. The values of its potential energy and total energy respectively are
Options:
A. -2K; -K
B. +2K; -K
C. -K, +2K
D. +K, +2K		 Option A Option A follows the correct atomic or modern physics formula.
13 Two nuclei have mass numbers A and B respectively. The density ratio of the nuclei is
Options:
A. A:B
B. √A:√B
C. A^2:B^2
D. 1:1		 Option D Option D is the correct answer according to the provided key.
14 The shortest wavelengths emitted in hydrogen spectrum corresponding to different spectral series are as under:
(A) Pfund series
(B) Balmer series
(C) Brackett series
(D) Lyman series
The wavelengths arranged correctly in decreasing order are
Options:
A. (A), (B), (C), (D)
B. (A), (C), (B), (D)
C. (B), (A), (D), (C)
D. (A), (C), (D), (B)		 Option B Option B follows the correct wave relation or spectrum order.
15 Silicon can be doped using one of the following elements as dopant:
(A) Arsenic
(B) Indium
(C) Phosphorus
(D) Boron
To get n-type semiconductor, the dopants that can be used are
Options:
A. (A) and (C) only
B. (B) and (C) only
C. (A), (B), (C) and (D)
D. (C) and (D) only		 Option A Option A is the correct answer according to the provided key.
16 Given below are V versus I graphs for different types of p-n junction diodes marked A, B, C and D.
Graph A: Forward bias characteristic.
Graph B: Solar cell characteristic (fourth quadrant).
Graph C: Reverse bias Zener breakdown.
Graph D: Diode characteristic showing forward and reverse bias.
The correct sequence of graphs corresponding to forward biased p-n junction; Zener diode; Photo diode and Solar cell in order is:
Options:
A. (D), (C), (A), (B)
B. (A), (C), (B), (D)
C. (B), (A), (D), (C)
D. (C), (B), (D), (A)		 Option A Option A matches the standard graph behavior for this physics concept.
17 A wire carrying current I, bent into two straight segments of length R and a semicircular arc of radius R, is placed in a uniform field B that emerges normally out from the plane. The force on this wire is
Options:
A. 4BIR, directed vertically downward
B. 3BIR, directed vertically upward
C. BI(2R+Ï€R), vertically downward
D. 2Ï€BIR, from P to Q		 Option A Option A is the correct result from the electrical relation used in this question.
18 The refractive index of the material of an equilateral prism is √2. The angle of minimum deviation of that prism is
Options:
A. 60°
B. 75°
C. 30°
D. 90°		 Option C Option C is the correct answer according to the provided key.
19 The transfer of integral number of ________ is one of the evidence of quantization of electric charge.
Options:
A. photons
B. nuclei
C. electrons
D. neutrons		 Option C Option C is the correct answer according to the provided key.
20 When a slab of insulating material 4 mm thick is introduced between the plates of a parallel plate capacitor of separation 4 mm, it is found that the distance between the plates has to be increased by 3.2 mm to restore the capacity to its original value. The dielectric constant of the material is
Options:
A. 2
B. 5
C. 3
D. 7		 Option B Option B is the correct result from the electrical relation used in this question.
21 A copper ball of density 8.0 g/cc and 1 cm in diameter is immersed in oil of density 0.8 g/cc. The charge on the ball if it remains just suspended in oil in an electric field of intensity 600Ï€ V/m acting in the upward direction is (Take g = 10 m/s^2)
Options:
A. 2 × 10^-6 C
B. 2 × 10^-5 C
C. 1 × 10^-5 C
D. 1 × 10^-6 C		 Option B Option B is the correct answer according to the provided key.
22 A metal wire is subjected to a constant potential difference. When the temperature of the metal wire increases, the drift velocity of the electron in it
Options:
A. increases, thermal velocity of the electrons decreases
B. decreases, thermal velocity of the electrons decreases
C. increases, thermal velocity of the electrons increases
D. decreases, thermal velocity of the electrons increases		 Option D Option D is the correct answer according to the provided key.
23 For the given mixed combination of resistors, calculate the total resistance between points A and B.
(The circuit shows a bridge-like structure with resistors 6Ω, 4Ω, 8Ω, 12Ω, 4Ω and 6Ω).
Options:
A. 9Ω
B. 18Ω
C. 4Ω
D. 14Ω		 Option A Option A is the correct result from the electrical relation used in this question.
24 A cell of emf 1.1 V and internal resistance 0.5Ω is connected to a wire of resistance 0.5Ω. Another cell of the same emf is now connected in series with the intention of increasing the current but the current in the wire remains the same. The internal resistance of the second cell is
Options:
A. 1Ω
B. 2.5Ω
C. 1.5Ω
D. 2Ω		 Option C Option C is the correct result from the electrical relation used in this question.
25 P, Q, R and S are four wires of resistances 3, 3, 3 and 4Ω respectively. They are connected to form the four arms of a Wheatstone bridge circuit. The resistance with which S must be shunted in order that the bridge may be balanced is
Options:
A. 14Ω
B. 12Ω
C. 15Ω
D. 7Ω		 Option B Option B is the correct result from the electrical relation used in this question.
26 Magnetic moment of a thin bar magnet is M. If it is bent into a semicircular form, its new magnetic moment will be
Options:
A. M/Ï€
B. M/2
C. M
D. 2M/Ï€		 Option D Option D is correct from the relevant magnetic field or induction principle.
27 Ferromagnetic material used in Transformers must have
Options:
A. Low permeability and High Hysteresis loss
B. High permeability and Low Hysteresis loss
C. High permeability and High Hysteresis loss
D. Low permeability and Low Hysteresis loss		 Option B Option B is correct from the relevant magnetic field or induction principle.
28 A conducting ring of radius r is placed in a varying magnetic field perpendicular to the plane of the ring. If the rate at which the magnetic field varies is x, the electric field intensity at any point of the ring is
Options:
A. x
B. rx/2
C. 2rx
D. 4r/x		 Option B Option B is correct from the relevant magnetic field or induction principle.
29 A 50 Hz ac current of crest value 1 A flows through the primary of a transformer. If the mutual inductance between the primary and secondary be 0.5 H, the crest voltage induced in the secondary is
Options:
A. 75 V
B. 150 V
C. 100 V
D. 200 V		 Option B Option B is the correct result from the electrical relation used in this question.
30 A long solenoid of diameter 0.1 m has 10^4 turns per meter. At the centre of the solenoid a coil of 100 turns and radius 0.01 m is placed with its axis coinciding with the solenoid axis. The current in the solenoid reduces at a constant rate to 0 A from 4 A in 0.05 s. If the resistance of the coil is 10π^2Ω, then the total charge flowing through the coil during this time is
Options:
A. 16 μC
B. 32 μC
C. 16π μC
D. 32π μC		 Option A Option A is the correct result from the electrical relation used in this question.
31 Lower half of a convex lens is made opaque. Which of the following statement describes the image of the object placed in front of the lens?
(A) No change in image
(B) Image will show only half of the object
(C) Intensity of image gets reduced
Options:
A. (A) only
B. (B) only
C. (C) only
D. (B) and (C) only		 Option C Option C is the correct answer according to the provided key.
32 Two slits are made 0.1 mm apart and the screen is placed 2 m away. The fringe separation when a light of wavelength 500 nm is used is
Options:
A. 1 cm
B. 0.15 cm
C. 1.5 cm
D. 0.1 cm		 Option A Option A follows the correct wave relation or spectrum order.
33 For an astronomical telescope having objective lens of focal length 10 m and eyepiece lens of focal length 10 cm, telescope's the tube length and magnification respectively are
Options:
A. 20 cm, 1
B. 1000 cm, 1
C. 1010 cm, 1
D. 1010 cm, 100		 Option D Option D is the correct answer according to the provided key.
34 According to Bohr's Model:
(A) The radius of the orbiting electron is directly proportional to 'n'.
(B) The speed of the orbiting electron is directly proportional to '1/n'.
(C) The magnitude of the total energy of the orbiting electron is directly proportional to '1/n^2'.
(D) The radius of the orbiting electron is directly proportional to n^2.
Options:
A. (A), (B) and (C) only
B. (A), (B) and (D) only
C. (A), (B), (C) and (D)
D. (B), (C) and (D) only		 Option D Option D follows the correct atomic or modern physics formula.
35 For a full wave rectifier, if the input frequency is 50 Hz the output frequency will be
Options:
A. 50 Hz
B. 100 Hz
C. 25 Hz
D. 0 Hz		 Option B Option B follows the correct wave relation or spectrum order.
36 For an electric dipole in a non-uniform electric field, dipole moment parallel to direction of the field, the force F and torque Ï„ on the dipole respectively are
Options:
A. F=0, Ï„=0
B. F≠0, τ=0
C. F=0, τ≠0
D. F≠0, τ≠0		 Option B Option B is correct from the relevant magnetic field or induction principle.
37 Two large plane parallel sheets shown in the figure have equal but opposite surface charge densities ±σ. A point charge q placed at points P1 (outside left), P2 (between) and P3 (outside right) experiences forces F1, F2 and F3 respectively. Then:
Options:
A. F1=0, F2=0, F3=0
B. F1=0, F2≠0, F3=0
C. F1≠0, F2≠0, F3≠0
D. F1=0, F3≠0, F2=0		 Option B Option B is the correct answer according to the provided key.
38 Two charged metallic spheres with radii R1 and R2 are brought in contact and then separated. The ratio of final charges Q1 and Q2 on the two spheres respectively will be
Options:
A. Q1/Q2 = R2/R1
B. Q1/Q2 < R1/R2
C. Q1/Q2 > R1/R2
D. Q1/Q2 = R1/R2		 Option D Option D is the correct answer according to the provided key.
39 Two charged particles, placed at a distance d apart in vacuum, exert a force F on each other. Now, each of the charges is doubled. To keep the force unchanged, the distance between the charges should be changed to
Options:
A. 4d
B. 2d
C. d
D. d/2		 Option B Option B is the correct answer according to the provided key.
40 Two parallel plate capacitors of capacitances 2 μF and 3 μF are joined in series and the combination is connected to a battery of V volts. The values of potential across the two capacitors V1 and V2 and energy stored in the two capacitors U1 and U2 respectively are related as
Options:
A. V1/V2 = U1/U2 = 3/2
B. V1/V2 = U1/U2 = 2/3
C. V1/V2 = 3/2 and U1/U2 = 2/3
D. V1/V2 = 2/3 and U1/U2 = 3/2		 Option A Option A is the correct result from the electrical relation used in this question.
41 Two resistances of 100Ω and 200Ω are connected in series across a 20 V battery. The reading in a 200Ω voltmeter connected across the 200Ω resistance is
Options:
A. 4 V
B. 20/3 V
C. 10 V
D. 16 V		 Option C Option C is the correct result from the electrical relation used in this question.
42 The current through a 4/3Ω external resistance connected to a parallel combination of two cells of 2 V and 1 V emf and internal resistances of 1Ω and 2Ω respectively is
Options:
A. 1 A
B. 2/3 A
C. 3/4 A
D. 5/6 A		 Option B Option B is the correct result from the electrical relation used in this question.
43 A metallic wire has resistance R, resistivity ρ and power rating P at V volts. The wire is uniformly stretched to reduce the radius to half. The new values R', ρ' and P' are:
Options:
A. ρ' = 2ρ, R' = 2R, P' = 2P
B. ρ' = ρ/2, R' = R/2, P' = P/2
C. ρ' = ρ, R' = 16R, P' = (1/16)P
D. ρ' = ρ, R' = (1/16)R, P' = 16P		 Option C Option C is the correct result from the electrical relation used in this question.
44 Three magnetic materials are listed: (A) paramagnetics, (B) diamagnetics, (C) ferromagnetics. Choose the correct order in increasing order of magnetic susceptibility.
Options:
A. (A), (B), (C)
B. (C), (A), (B)
C. (B), (A), (C)
D. (B), (C), (A)		 Option C Option C is correct from the relevant magnetic field or induction principle.
45 Two infinitely long straight parallel conductors carrying currents I1 and I2 are held at a distance d apart. The force F on a length L of one is
Options:
A. proportional to L but independent of I1 × I2
B. proportional to I1 × I2 but independent of L
C. proportional to I1 × I2 × L
D. proportional to L/(I1 × I2)		 Option C Option C is the correct result from the electrical relation used in this question.
46 In the circuit shown, current 3I enters at A. Semicircular parts ABC and ADC have equal radii r but resistances 2R and R. The magnetic field at the center is
Options:
A. μ0I/4r out of the plane
B. μ0I/4r into the plane
C. μ03I/4r out of the plane
D. μ03I/4r into the plane		 Option A Option A is the correct result from the electrical relation used in this question.
47 A square loop with side 1 cm, carrying 10 A, is placed in a field of 0.2 T parallel to the plane of the loop. The torque experienced is
Options:
A. zero
B. 2 × 10^-4 Nm
C. 2 × 10^-2 Nm
D. 2 Nm		 Option B Option B is the correct answer according to the provided key.
48 In an ac circuit, the current leads the voltage by π/2. The circuit is
Options:
A. purely resistive
B. resistance equal to reactance
C. purely inductive
D. purely capacitive		 Option D Option D is the correct result from the electrical relation used in this question.
49 In a pair of adjacent coils, current changes from 0 A to 10 A in 0.25 s and flux changes by 15 Wb. The mutual inductance is
Options:
A. 120 H
B. 12 H
C. 1.5 H
D. 0.75 H		 Option C Option C is the correct result from the electrical relation used in this question.
50 An irregular wire turns into a circular loop in a field into the plane (Fig a). A circular loop turns into a narrow straight wire in a field out of the plane (Fig b). The induced current is
Options:
A. clockwise in both (a) and (b)
B. anticlockwise in both (a) and (b)
C. clockwise in (a) and anticlockwise in (b)
D. anticlockwise in (a) and clockwise in (b)		 Option D Option D is the correct result from the electrical relation used in this question.

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Publishing note: This page was generated from the uploaded CUET UG 2024 Physics paper. A few questions in some source PDFs may contain OCR or scan artefacts; in such cases the original source material should be treated as the final reference.