CUET UG Physics Mock Test

CUET UG Physics Mock Test for free online practice of upcoming exam in 2025-2026.

Subject: Physics
Medium: English
Questions: 50

Results

#1. A soap bubble is given a negative charge, then its radius

Decreases

Increases

remains unchanged

nothing can be predicted as information is insufficient

When a soap bubble is given a negative charge, then the
charges at diametrically opposite ends like at the end AB or
CD as shown in figure alongside repel. Hence, its radius increases.

#2. In charging by induction,

body to be charged must be an insulator

body to be charged must be a semiconductor

body to be charged must be a conductor

any type of body can be charged by induction

(c) Induction requires shifting of free charge carrier which
are present only in conductors.
Hence, in charging by induction, body to be charged must
be a conductor

#3. The electric field at a point is

always continuous

continuous, if there is no charge at that point

continuous, if there is a charge at that point

None of the above

(b) The electric field due to a charge Q at a point in space
may be defined as the force that a unit positive charge would
experience if placed at that point.
Thus, electric field due to the charge Q will be continuous, if
there is no charge at that point.
It will be discontinuous if there is a charge at that point.

#4. Two field lines can never cross each other because

field lines are closed curves

field lines repels each other

field lines crowded only near the charge

field has a unique direction at each point

#5. To find the value of potential at a point, the external force at every point of the path is to be equal and opposite to the

work done

electrostatic force on the test charge at that point

potential energy

None of the above

#6. The total dipole moment of dielectric with polar molecules in absence of an external electric field is

zero

negative

infinite

None of these

#7. Three capacitors each of capacitance 9 pF are connected in series. What is the potential difference across each capacitor, if the combination is connected to a 120 V supply?

40 V

60 V

80 V

50 V

#8. A wire of resistance 4 $\Omega$ is stretched to twice its original length. The resistance of stretched wire would be

2 $\Omega$

4 $\Omega$

8 $\Omega$

16 $\Omega$

#9. A 200 $\Omega$ resistor has a certain colour code. If one replaces the red colour by green in the code, the new resistance will be

100 $\Omega$

400 $\Omega$

300 $\Omega$

500 $\Omega$

#10. A cell can be balanced against 110 cm and 100 cm of potentiometer wire respectively, with and without being short circuited through a resistance of 10 $\Omega$ . Its internal resistance is

1.0 $\Omega$

0.5 $\Omega$

2.0 $\Omega$

zero

#11. A storage battery of emf 8 V and internal resistance 0.5 $\Omega$ W is being charged by a 120 V DC supply using a series resistor of 15.5 $\Omega$ . What is the terminal voltage of the battery during charging?

10 V

11.5 V

7 V

16 V

#12. Magnetic field in a region is produced by

only static charges

only moving charges

Both static and moving charges

Neither static charges nor moving charges

(b) Static charges produce only electric field, whereas
moving charges produce electric and magnetic fields both.

#13. A proton, a deuteron and an a-particle enter a region of perpendicular magnetic field (to their velocities) with same kinetic energy. If r_p, r_d and r_a are the radii of circular paths of these particles, then

$r_a = r_d < r_p$

$r_a = r_d = r_p$

$r_a < r_d < r_p$

$r_a > r_d > r_p$

#14. If two parallel current carrying conductors placed 1 m apart in vacuum are placed such that each carries 1 A current, then there is a force of

$2 \times 10^{-7} Nm^{-1}$

$2 \times 10^{7} Nm^{-1}$

$9 \times 10^{9} Nm^{-1}$

$9 \times 10^{-9} Nm^{-1}$

#15. A 3.0 cm wire carrying a current of 10 A is placed inside a solenoid perpendicular to its axis. The magnetic field inside the solenoid is given to be 0.27 T. What is the magnetic force on the wire?

$7 \times 10^{-2} N$

$8.1 \times 10^{-2} N$

$6.4 \times 10^{-2} N$

$4 \times 10^2 N$

#16. A bar magnet is oscillating in the earth’s magnetic field with a period T. What happens to its period of motion, if its mass is quadrupled?

Motion remains simple harmonic with new period = T/2

Motion remains simple harmonic with new period = 2T

Motion remains simple harmonic with new period = 4T

Motion remains simple harmonic and the period stays nearly constant

#17. At a certain place, horizontal component is $\sqrt 3$ times the vertical component. The angle of dip at this place is

zero

$\frac{\pi}{3}$

$\frac{\pi}{6}$

None of these

#18. Which of the following substance have tendency to move from stronger to the weaker part of the external magnetic field?

Ferromagnetic substance

Paramagnetic substance

Diamagnetic substance

All of these

#19. A circular disc of radius 0.2 m is placed in a uniform magneticfield of induction $(\frac{1}{\pi}) Wbm^{-2}$ in such a way that its axis makes an angle of 60° with B. The magnetic flux linked with the disc is

0.02 Wb

0.06 Wb

0.08 Wb

0.01 Wb

#20. According to Faraday’s law of electromagnetic induction, the magnitude of the induced emf in a circuit is equal to the time rate of change of

magnetic field induction

magnetising field intensity

magnetic flux

electric flux

#21. A closed loop moves normal to the constant electric field between the plates of a large capacitor. Is the current induced in the loop when it is wholly inside the region between the capacitor plates?

Yes

May be possible

May not be possible

(b) According to question, there can be two cases as follows
Case I Closed coil is moving inside constant electric field.
Case II Closed coil is wholly inside constant electric field.
However, no current is induced in either case because
current cannot be induced by changing the electric flux.

#22. A generator produces a voltage that is given by V = 240 sin 120 t ,where t is in seconds. The frequency and rms voltage are

60 Hz and 240 V

19 Hz and 120 V

19 Hz and 170 V

754 Hz and 70 V

#23. A charged 40 $\mu F$ capacitor is connected to a 16 mH inductor. What is the angular frequency of free oscillations of the circuit?

1.1 s

$1.25 \times 10^3 s^{-1}$

$2 \times 10^3 s^{-1}$

$2.5 \times 10^3 s^{-1}$

#24. 6 A power transmission line feeds input power at 2300 V to a step-down transformer with its primary windings having 4000 turns. The output power is delivered at 230 V by the transformer. If the current in the primary of the transformer is 5A and its efficiency is 90%, the output current would be

45 A

50 A

25 A

35 A

#25. In an electromagnetic wave in free space, the root mean square value of the electric field is E_rms = 6 V/m. The peak value of the magnetic field is

$1.41 \times 10^{-8} T$

$2.83 \times 10^{-8} T$

$0.7 \times 10^{-8} T$

$4.23 \times 10^{-8} T$

#26. Which of the following are electromagnetic waves?

Visible light waves and X-rays

Gamma rays and radio waves

Microwaves and ultraviolet rays

All of the above

#27. Wavelength of gamma rays are

$10^{-10}$ m to less than $10^{-14} m$

$10^{-14}$ m to less than $10^{-10} m$

$10^{-11}$ m to less than $10^{-14} m$

$10^{-14}$ nm to less than $10^{-10} nm$

#28. The rays that are incident at points close to the pole of the mirror and make small angles with the principal axis are known as

paraxial rays

perpendicular rays

principal rays

beam of rays

#29. In total internal reflection, when the angle of incidence is equal to the critical angle for the pair of media in contact, what will be angle of refraction?

0º

Equal to angle of incidence

90º

180º

#30. Photometry is a measurement of physiological phenomenon. The main physical quantities in photometry is/are

luminous intensity

luminous flux

illuminance

All of these

#31. To remove the chromatic aberration and distortions, due to lens of large size, the objective of telescope is replaced by

convex mirror

plane mirror

concave mirror

plano-concave lens

#32. Light propagates rectilinearly, due to

wave nature

large wavelength

high velocity

high frequency

#33. According to Huygens’ principle, each point of the wavefront is the source of

secondary disturbance

primary disturbance

third disturbance

fourth disturbance

#34. The waves produced by a vibrating string in a plane are

unpolarised wave

plane polarised wave

linearly polarised wave

circularly polarised wave

#35. Free electrons cannot normally escape out of metal surface because

free electrons are bounded to one or other ionic core

free electrons lie deep inside atom

free electrons are held in metal lattice by attraction force of protons

if an electron attempts to come out of metal, the metal surface acquires a positive charge and pulls the electron back to metal

(d) If an electron attempts to come out of the metal, the metal surface acquires a positive charge and pulls the electron back to the metal. The free electron is thus held inside the metal surface by the attractive forces of the ions.

#36. Photoemission with visible light is possible in

rubidium

cesium

zinc

Both (a) and (b)

(d) It has been observed that certain metals like zinc, cadmium, magnesium, etc. responded only to ultraviolet light, having short wavelength to cause electron emission from the surface. However, some alkali metals such as lithium, sodium, potassium, cesium and rubidium were even sensitive to visible light.

#37. All photons present in a light beam of single frequency have

same frequency but different momentum

same momentum but different frequency

different frequency and momentum

same frequency and momentum

#38. The orbital radius of an electron in H-atom is increased by factor of 2, then the total energy of the electron will be

decreased by 4

increased by 2

decreased by 2

remain same

#39. If radius of first Bohr orbit is r,then the radius of second Bohr’s orbit will be

2 r

8 r

4 r

$2 \sqrt2r$

#40. The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom, is

2 : – 1

1 : – 1

1 : 1

1 : – 2

#41. 3 Masses of the nuclei of hydrogen, deuterium and tritium are in ratio

1 : 2 : 3

1 : 1 : 1

1 : 1 : 2

1 : 2 : 4

(a) Since, the nuclei of deuterium (₁H² ) and tritium ₁H³ are isotopes of hydrogen ₁H¹ , they must contain only one proton each. But the masses of the nuclei of hydrogen, deuterium and tritium are in the ratio of 1 : 2 : 3, because of presence of neutral matter in deuterium and tritium nuclei.

#42. The activity of a radioactive sample falls from 700s^-1 to 500s^-1 in 30 min. Its half-life is close to

62 min

66 min

72 min

52 min

#43. When a nucleus is in an excited state,

it can stay in excited state

it gives excess energy to surrounding electrons and comes to a lower energy state

it can make a transition to a lower energy state by emission of a photon

it can emit a proton or neutron with excess kinetic energy and so achieves a lower energy state

#44. In solid state semiconductors, the number and the direction of the flow of charge carriers can be altered by

illuminating light

supplying heat

varying applied voltage

All of the above

#45. Number of electrons available for conduction due to doping atom in an extrinsic semiconductor

increases with increase of temperature

decreases with increase of temperature

is independent of change in ambient temperature

reduces to zero at temperature above room temperature

#46. A diode is a

three-terminal device

piece of a semiconductor crystal with metallic contacts provided at two ends

p-n junction with metallic contacts provided at two ends

piece of a metal which is sprayed over by a semiconductor

#47. A 220 V AC supply is connected between points A and B.
What will be potential difference across capacitor C?

220 V

110 V

0 V

220 $\sqrt{2} V$

#48. The modulated signal consists of the carrier wave of frequency $\omega_c$ plus two sinusoidal waves each with a frequency slightly different, known as

sidebands

baseband

width band

All of these

(a) The modulated signal consists of the carrier wave of frequency wc plus two sinusoidal waves each with a frequency slightly different known as sidebands.

#49. Radio waves are propagated through

ground wave

sky wave

space wave

All of these

(d) Radio waves are propagated through ground, sky and space waves. It has frequency from 300 Hz to as low as 3 kHz and corresponding wavelength ranging from 1 mm to 100 km.

#50. In the communication system, AM is used for broadcasting, because

it avoids receiver complexity

it is more noise immune than other modulation system

it requires less transmitting power

no other modulation system can give the necessary bandwidth for faithful transmission

(a) In the communication system, AM is used for broadcasting because it avoids receiver complexity level to maintain high strength of a modulating signal.

FINISH

Results

#1. A soap bubble is given a negative charge, then its radius

#2. In charging by induction,

#3. The electric field at a point is

#4. Two field lines can never cross each other because

#5. To find the value of potential at a point, the external force at every point of the path is to be equal and opposite to the

#6. The total dipole moment of dielectric with polar molecules in absence of an external electric field is

#7. Three capacitors each of capacitance 9 pF are connected in series. What is the potential difference across each capacitor, if the combination is connected to a 120 V supply?

#8. A wire of resistance 4 is stretched to twice its original length. The resistance of stretched wire would be

#9. A 200 resistor has a certain colour code. If one replaces the red colour by green in the code, the new resistance will be

#10. A cell can be balanced against 110 cm and 100 cm of potentiometer wire respectively, with and without being short circuited through a resistance of 10 . Its internal resistance is

#11. A storage battery of emf 8 V and internal resistance 0.5 W is being charged by a 120 V DC supply using a series resistor of 15.5 . What is the terminal voltage of the battery during charging?

#12. Magnetic field in a region is produced by

#13. A proton, a deuteron and an a-particle enter a region of perpendicular magnetic field (to their velocities) with same kinetic energy. If rp, rd and ra are the radii of circular paths of these particles, then

#14. If two parallel current carrying conductors placed 1 m apart in vacuum are placed such that each carries 1 A current, then there is a force of

#15. A 3.0 cm wire carrying a current of 10 A is placed inside a solenoid perpendicular to its axis. The magnetic field inside the solenoid is given to be 0.27 T. What is the magnetic force on the wire?

#16. A bar magnet is oscillating in the earth’s magnetic field with a period T. What happens to its period of motion, if its mass is quadrupled?

#17. At a certain place, horizontal component is times the vertical component. The angle of dip at this place is

#18. Which of the following substance have tendency to move from stronger to the weaker part of the external magnetic field?

#19. A circular disc of radius 0.2 m is placed in a uniform magneticfield of induction in such a way that its axis makes an angle of 60° with B. The magnetic flux linked with the disc is

#20. According to Faraday’s law of electromagnetic induction, the magnitude of the induced emf in a circuit is equal to the time rate of change of

#21. A closed loop moves normal to the constant electric field between the plates of a large capacitor. Is the current induced in the loop when it is wholly inside the region between the capacitor plates?

#22. A generator produces a voltage that is given by V = 240 sin 120 t ,where t is in seconds. The frequency and rms voltage are

#23. A charged 40 capacitor is connected to a 16 mH inductor. What is the angular frequency of free oscillations of the circuit?

#25. In an electromagnetic wave in free space, the root mean square value of the electric field is Erms = 6 V/m. The peak value of the magnetic field is

#26. Which of the following are electromagnetic waves?

#27. Wavelength of gamma rays are

#28. The rays that are incident at points close to the pole of the mirror and make small angles with the principal axis are known as

#29. In total internal reflection, when the angle of incidence is equal to the critical angle for the pair of media in contact, what will be angle of refraction?

#30. Photometry is a measurement of physiological phenomenon. The main physical quantities in photometry is/are

#31. To remove the chromatic aberration and distortions, due to lens of large size, the objective of telescope is replaced by

#32. Light propagates rectilinearly, due to

#33. According to Huygens’ principle, each point of the wavefront is the source of

#34. The waves produced by a vibrating string in a plane are

#35. Free electrons cannot normally escape out of metal surface because

#36. Photoemission with visible light is possible in

#37. All photons present in a light beam of single frequency have

#38. The orbital radius of an electron in H-atom is increased by factor of 2, then the total energy of the electron will be

#39. If radius of first Bohr orbit is r,then the radius of second Bohr’s orbit will be

#40. The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom, is

#41. 3 Masses of the nuclei of hydrogen, deuterium and tritium are in ratio

#42. The activity of a radioactive sample falls from 700s-1 to 500s-1 in 30 min. Its half-life is close to

#43. When a nucleus is in an excited state,

#44. In solid state semiconductors, the number and the direction of the flow of charge carriers can be altered by

#45. Number of electrons available for conduction due to doping atom in an extrinsic semiconductor

#46. A diode is a

#47. A 220 V AC supply is connected between points A and B. What will be potential difference across capacitor C?

#48. The modulated signal consists of the carrier wave of frequency plus two sinusoidal waves each with a frequency slightly different, known as

#49. Radio waves are propagated through

#50. In the communication system, AM is used for broadcasting, because

Related Posts

#8. A wire of resistance 4 $\Omega$ is stretched to twice its original length. The resistance of stretched wire would be

#9. A 200 $\Omega$ resistor has a certain colour code. If one replaces the red colour by green in the code, the new resistance will be

#10. A cell can be balanced against 110 cm and 100 cm of potentiometer wire respectively, with and without being short circuited through a resistance of 10 $\Omega$ . Its internal resistance is

#11. A storage battery of emf 8 V and internal resistance 0.5 $\Omega$ W is being charged by a 120 V DC supply using a series resistor of 15.5 $\Omega$ . What is the terminal voltage of the battery during charging?

#13. A proton, a deuteron and an a-particle enter a region of perpendicular magnetic field (to their velocities) with same kinetic energy. If r_p, r_d and r_a are the radii of circular paths of these particles, then

#17. At a certain place, horizontal component is $\sqrt 3$ times the vertical component. The angle of dip at this place is

#19. A circular disc of radius 0.2 m is placed in a uniform magneticfield of induction $(\frac{1}{\pi}) Wbm^{-2}$ in such a way that its axis makes an angle of 60° with B. The magnetic flux linked with the disc is

#23. A charged 40 $\mu F$ capacitor is connected to a 16 mH inductor. What is the angular frequency of free oscillations of the circuit?

#25. In an electromagnetic wave in free space, the root mean square value of the electric field is E_rms = 6 V/m. The peak value of the magnetic field is

#42. The activity of a radioactive sample falls from 700s^-1 to 500s^-1 in 30 min. Its half-life is close to

#47. A 220 V AC supply is connected between points A and B.
What will be potential difference across capacitor C?

#48. The modulated signal consists of the carrier wave of frequency $\omega_c$ plus two sinusoidal waves each with a frequency slightly different, known as