Physics CUET-2023

1. The kinetic energy of an electron at ground level in a hydrogen atom is K units. The values of its potential energy and total energy respectively are______

Fill in the blank with the correct answer from the options given below.

(1)  - 2K; K         

(2) + 2K; - K

(3) -K, + 2K        

(4) + K, +2K 

2. Two nuclei have mass numbers A and B respectively. The density ratio of the nuclei is_____

Fill in the blank with the correct answer from the options given below.

(1)A:B              

(2)√A:√B       

(3)A²:B²                    

(4) 1:1

3. 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

Fill in the blank with the correct answer from the options given below.

1)

2)

3)

4)

4. A proton accelerated through a potential difference  has a de Broglie wavelength . On doubling the accelerating potential, de Broglie wavelength of the proton  .

Fill in the blank with the correct answer from the options given below.
(1) remains unchanged
(2) becomes double
(3) becomes four times
(4) decreases

5. The shortest wavelengths emitted in hydrogen spectrum corresponding to different spectral series are as under
(A) Pfund series
(B) Balmer series
(C)Brackett series
(B) Balmer series

The wavelengths arranged correctly in decreasing order are ________
Fill in the blank with the correct answer from the ontions given below
(1) (A), (B), (C), (D)
(2) , (B), (D)
(3) (B), (A), (D), (C)
(4) (A), (C), (D), (B)

6. Silicon can be doped using one of the following
(A) Arsenic
(B) Indium
(C) Phosphorus
(D) Boron

To get n-type semiconductor, the dopants that can be used are _________
Fill in the blank with the correct answer from the options given below.
(1) (A) and (C) only
(2) (B) and (C) only
(3) (A), (B), (C) and (D)
(4) (C) and (D) only

7. Given below are versus 1 graphs for different types of p-n junction diodes marked A, B, C and D

(A)

(B)

(C)

(D)

The correct sequence of graphs corresponding to forward biased p-n junction; Zener diode; Photo diode and Solar cell in order is _______

Fill in the blank with the correct answer from the options given below.
(1) (D), (C), (A), (B)

(2) (A), (C), (B), (D)
(3) (B), (A), (D), (C)

(4) (C), (B), (D), (A)

7. A wire carrying current I, bent as shown in the figure, is placed in a uniform field B that emerges normally out from the plane of the figure. The force on this wire is _____

Fill in the blank with the correct answer from the options given below.

1. 4BIR, directed vertically downward

2. 3BIR, directed vertically upward

3. BI(2R+πR), vertically downward

4. 2πBIR, from P to Q

9. The refractive index of the material of an equilateral prism is √2 . The angle of minimum deviation of that prism is__________

Fill in the blank with the correct answer from the options given below.

(1) 60Degree

(2) 75 Degree

(3) 30 Degree

(4)90 Degree

10. The transfer of integral number of  _________ one of the evidence of quantization of electric charge.

Fill in the blank with the correct answer from the option given below.

(1) photons

(2) nuclei

(3) electrons

(4) neutrons

11. When a slab of insulating material  thick is introduced between the plates of a parallel plate capacitor of separation 4mm , it is found that the distance between the plate has to be increased by 3.2mm to restore the capacity to its original value. The dielectric constant of the material is ______

Fill in the blank with the correct answer from the options given below.
(1) 2    

(2) 5

(3) 3          

(4) 7

12. A copper ball of density 8.0 g/cc and 1cm in diameter is immersed in oil of  density8.0 g/cc . The charge on the ball if it remains just suspended in oil in an electric field of intensity 600ΠV/M acting in the upward direction is __________.

Fill in the blank with the correct answer from the options given below. (Take Take g=10m/s² )
(1)2 x 10‾⁶C 

(2)2 x 10‾⁵C 

(3)1 x 10‾⁵C 

(4)1 x 10‾⁶C 

13. 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 ____

Fill in the blank with the correct answer from the options given below.

(1) increases, thermal velocity of the electrons decreases

(2) decreases, thermal velocity of the electrons decreases

(3) increases, thermal velocity of the electrons increases

(4) decreases, thermal velocity of the electrons increases

14. For the given mixed combination of resistors calculate the total resistance between points A and B.

Choose the correct answer from the options given below.
(1)   

(2)           

(3)        

(4)    

15. A cell of emf 1.1V and internal resistance 0.5Ω is connected to a wire of resistance 0.5Ω . Another cell of the same emf 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.
Fill in the blank with the correct answer from the options given below.
(1) 1Ω 

(2) 2.5Ω         

(3) 1.5Ω   

(4) 2Ω

16. P, Q, R and  are four wires of resistances 3,3,3 and 4Ω  and  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 __________

Fill in the blank with the correct answer from the options given below
(1)14Ω            

(2)12Ω                   

(3)15Ω    

(4)7Ω

17. Magnetic moment of a thin bar magnet is ‘M' '. If it is bent into a semicircular form, its new magnetic moment will be__________.

Fill in the blank with the correct answer from the options given below
(1)M/Π           

(2)M/2         

(3)M   

(4)2M/Π

18. Ferromagnetic material used in Transformers must have _________

Fill in the blank with the correct answer from the options given below

(1) Low permeability and High Hysteresis loss

(2) High permeability and Low Hysteresis loss

(3) High permeability and High Hysteresis loss

(4) Low permeability and Low Hysteresis loss

19. 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 ______

Fill in the blank with the correct answer from the options given below.

1) rx

2) rx/2

3) 2rx

4) 2M/Π           

20. A 50HZ ac current of crest value 1A flows through the primary of a transformer. If the mutual inductance between the primary inductance between the primary and secondary be 0.5H, the crest voltage induced in the secondary is _______________
Fill in the blank with the correct answer from the options given below.
(1)75V                       

(2)150V

(3)100V              

(4)200V

21. A long solenoid of diameter 0.1m has  2x10⁴ turns per meter. At the centre of the solenoid a coil of 100 turns and radius 0.01m is 100V solenoid reduces at a constant placed with its axis coinciding with the solenoid axis. The current in the total charge flowing through the to 0 A from 4 A in 0.05s . If the resistance of the coil is 10Π²Ω, then the Fill in the blank with the comet during this time is 

(1)16μC

(2)32μC

(3)16ΠμC                   

(4)32ΠμC

22. 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

Choose the correct answer from the options given below.

(1) (A) only                 

(2) (B) only

(3) (C) only                 

(4) (B) and (C) only

23. Two slits are made 0.1mm apart and the screen is placed 2m away. The fringe separation when a light of  wavelength  is used is ______

Fill in the blank with the correct answer from
(1)1m          

(2)0.15cm
(3)1.5cm                    

(4)0.1cm

24. For an astronomical telescope having objective lens of focal length 10m and eyepiece lens of focal length 10cm. telescope's the tube length and magnification respectively are ________

Fill in the blank with the correct answer from the options given below
(1) 20cm,1 

(2) 1000cm,1

(3) 1010 cm, 1             

(4) 1010 cm ,100

25. 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 'l/n'.

(C) The magnitude of the total energy of the orbiting electron is directly proportional to 'l/n²

(D) The radius of the orbiting electron is directly proportional to 'n²

Choose the correct answer from the options given below.

(1) (A), (B) and (C) only

(2) (A), (B) and (D) only

(3) (A), (B), (C) and (D)

(4) (B), (C) and (D) only

26. For a full wave rectifier, if the input frequency is 50 Hz, the output frequency will be _______

Fill in the blank with the correct answer from the options given below.

(1) 50 Hz                    

(2) 100 Hz

(3) 25 Hz                    

(4) 0 Hz

27. For an electric dipole in a non-uniform electric field with dipole moment parallel to direction of the field, the force F and torque T on the dipole respectively are

Fill in the blank with the correct answer from the options given below.

(1)  
(2) 

(3) 

(4) 

Choose the correct answer from the options given below

29. 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 ________

Fill in the blank with the correct answer from the options given below.

30. Two charged particles, placed at a distance d apart in vacuum, exert a force F on each other. Now, each the charges are doubled. To keep the force unchanged, the distance between the charges should be changed to ________
Fill in the with the correct answer from the options given below.

(1) 4d  

(2) 2d               

(3) d

(4) d/2

31. Two parallel plate capacitors of capacitances 2μF and 3μF 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 _________

Fill in the blank with the correct answer from the options given below.

32. Two resistances of 100Ω and 200Ω are connected in series across a 20 V battery as shown in figure below. The reading in a 200Ω voltmeter connected  across series across a 200Ω resistance is _____

Fill in the blank with the correct answer from the options given below.
(1) 4 I  

(2)20/3 V
(3) 10 v

(4) 16 V

33. The current through a 4/3Ω external resistance connected to a parallel combination of two cells of 2V and 1V emf and internal resistances of 1Ω respectively is _______.

Fill in the blank with the correct answer from the options given below. .

(1) 1A       

(2) 2/3A

(3) 3/4A

(4) 5/6A

34. A metallic wire of uniform area of cross section has a resistance , resistivity  and power rating P at V volts. The wire is uniformly stretched to reduce the radius to half the original radius. The values of resistance, resistivity and power rating at V volts are now denoted by R' , P' and P' and  respectively. The corresponding values are correctly related as __________
Fill in the blank with the correct answer from the options given below.

35. Three magnetic materials are listed below
(A) paramagnetics
(B) diamagnetic
(C) ferromagnetics

Choose the correct order of the materials in in
(1) (A), (B), (C)

(2) (C), (A), (B)
(3) (B), (A), (C)

(4) (B), (C), (A)

36. Two infinitely long straight parallel conductors carrying currents I₁ and I₂ are held at a distance d apart in a vacuum. The force F on a length L of one of the conductors due to the other is _______  .

Fill in the blank with the correct answer from the options given below.
(1) proportional to L but independent of I₁ x 1₂
(2) proportional to I₁ x 1₂ but independent   of length L

(3) proportional to I₁ x 1₂ x L

(4) proportional to L/I₁ x 1₂

37. In a current 3 I enters at A . The semicircular parts ABC and ADC have equal radi 'r' but resistances 2r and r respectively. The magnetic field the center of the circular loop ABCD is

Fill in the blank with the correct answer from the options given below.
    

38. A square loop with each side 1cm, carrying a current of 10 A, is placed in a magnetic field of . The direction of the magnetic field is parallel to the plane of the loop. The torque experienced by the loop is _____

Fill in the blank with the correct answer from the options given below.
(1) zero                       

(2) 2 x 10 ^-4 Nm
(3) 2 x 10 ^-2 Nm                     

(4) 2Nm

39. In an ac circuit, the current leads the voltage by π/2. The circuit is ________

Fill in the blank with the correct answer from the options given below.

(1) purely resistive

(2) should have circuit elements with resistance equal to reactance.

(3) purely inductive

(4) purely capacitive

40. In a pair of adjacent coils, for a change of current in one of the coils from 0 A to 10 A in 0.25 s, the magnetic flux in the adjacent coil changes by 15 Wb. The mutual inductance of the coils is _______

Fill in the blank with the correct answer from the options given below.

(1) 120 H        

(2) 12 H   

(3) 1.5 H  

(4) 0.75 H

41. A wire of irregular shape in figure (a) and a circular loop of wire in figure (b) are placed in different uniform magnetic fields as shown in the figures below. In figure (a), the magnetic field is perpendicular into the plane. In figure (b), the magnetic field is perpendicular out of the plane.

The wire in figure (a) is turning into a circular loop and that in figure (b) into a narrow straight wire. The direction of induced current will be _________

Fill in the blank with the correct answer from the options given below.

(1) clockwise in both (a) and (b)

(2) anticlockwise in both (a) and (b)

(3) clockwise in (a) and anticlockwise in (b)

(4) anticlockwise in (a) and clockwise in (b)

42. Match List-I has four graphs showing variation of opposition to flow of ac versus frequency with circuit characteristic in List-II.

Choose the correct answer from the options given below.

(1) (A) - (I), (B) - (II), (C) - (III), (D) - (IV)

(2) (A) - (IV), (B) - (III), (C) - (II), (D) - (I)

(3) (A) - (I), (B) - (II), (C) - (IV), (D) - (III)

(4) (A) - (III), (B) - (IV), (C) - (I), (D) - (II)

43. In an electromagnetic wave, the ratio of energy densities of electric and magnetic fields is______

 Fill in the blank with the correct answer from the options given below.

(1) 1:1

(2) 1:c

(3) c:1

(4) 1:c²

44. Of the following, the correct arrangement of electromagnetic spectrum in decreasing order of wavelength is ______

Fill in the blank with the correct answer from the options given below.

(1) Radio waves, X-rays, Infrared waves, microwaves, visible waves

(2) Infrared waves, microwaves, Radio waves, X-rays, visible waves

(3) Radio waves, microwaves, Infrared waves, visible waves, X-rays

(4) X-rays, visible waves, Infrared waves, microwaves, Radio waves

45. Match Electromagnetic waves listed in column I with Production method/device in column II.

The correctly matched combination is as in option:

(1) (A)-(I), (B) - (II), (C) - (III), (D) - (IV)

(2) (A) - (II), (B) - (III), (C) - (IV), (D) - (I)

(3) (A)-(II), (B) - (I), (C) - (IV), (D) - (III)

(4) (A) - (III), (B) - (IV), (C) - (I), (D) - (II)

46. 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 ______

Fill in the blank with the correct answer from the options given below.

(1) 16 cm left of P in air

(2) 16 cm right of P in water

(3) 20 cm right of P in water

(4) 20 cm left of P in air

47. For fixed values of radii of curvature of lens, power of the lens will be ______

Fill in the blank with the correct answer from the options given below.

(1) P ∝ (μ-1)
(2) P ∝ μ²
(3) P ∝ μ^-2

(4) P ∝ 1/μ

48. The graph correctly representing the variation of image distance 'V'   for a convex lens of focal length 'f' versus object distance 'u' is __________

Fill in the blank with the correct answer from the options given below.

(1)

(2)

(3)

(4)

49. Using light from a monochromatic source to study diffraction in a single slit of width , the linear width of central maxima is measured to be  on a screen held  away. The wavelength of light used is _______

Fill in the blank with the correct answer from the options given below.
(1)2.5 x 10^-7 m
(2)4 x 10^-7 m
(3)5 x 10^-7 m
(4)7.5 x 10^-7 m

50. Radiation of frequency 2v₀ is incident on a metal with threshold frequency v_0. The correct statement of the following is _______

Fill in the blank with the correct answer from the options given below.

(1) No photoelectrons will be emitted

(2) All photoelectrons emitted will have kinetic energy equal to hv₀

(3) Maximum kinetic energy of photoelectrons emitted can be hv₀

(4) Maximum kinetic energy of photoelectron emitted will be 2hv₀