AKUEB Class 11 Physics Past Paper 2025 - Practice Online

Class 11 - Physics / Unit 10 - Thermodynamics / 10.11 Entropy / 10.11.5

Past Paper 2025EASY

An increase in the thermal pollution of the environment means an increase in

entropy.soil erosion.adiabatic expansion.isothermal compression.

Class 11 - Physics / Unit 10 - Thermodynamics / 10.9 Carnot Engine / 10.9.3

Past Paper 2025EASY

The efficiency (E) of a Carnot engine is always

E < 0\%

E = 0\%

E < 100\%

E = 100\%

Class 11 - Physics / Unit 10 - Thermodynamics / 10.5 First Law of Thermodynamics / 10.5.3

Past Paper 2025MEDIUM

In the given figure, four different processes for a constant amount of an ideal gas, all starting at state $a$ , are shown. In which of the given processes, the system does ZERO work on its surrounding?

ABCD

Class 11 - Physics / Unit 10 - Thermodynamics / 10.5 First Law of Thermodynamics / 10.5.2

Past Paper 2025HARD

Which of the following options is CORRECT according to the different processes of thermodynamics?

Isothermal process:

q = +W

Isochoric process:

\Delta U = -q

Adiabatic process:

\Delta U = +W

Isobaric process:

q = -W

Class 11 - Physics / Unit 10 - Thermodynamics / 10.5 First Law of Thermodynamics / 10.5.1

Past Paper 2025EASY

The first law of thermodynamics gives the relationship between heat

and workdone only.and internal energy of a system.workdone and properties of a system.workdone and internal energy of a system.

Class 11 - Physics / Unit 10 - Thermodynamics / 10.5 First Law of Thermodynamics / 10.5.3

Past Paper 2025MEDIUM

If the volume of an ideal gas in an insulated container increases from $10\text{ m}^3$ to $20\text{ m}^3$ under a constant pressure of $2\times10^5\text{ Pa}$ , then the work done by the gas will be

1\times10^4\text{ J}

2\times10^4\text{ J}

2\times10^6\text{ J}

6\times10^6\text{ J}

Class 11 - Physics / Unit 9 - Physical Optics / 9.5 Bragg's Law / 9.5.3

Past Paper 2025MEDIUM

What is the path difference of two incident rays in the given figure?

d

2d

d\sin\theta

2d\sin\theta

Class 11 - Physics / Unit 9 - Physical Optics / 9.2 Interference of Light / 9.2.3

Past Paper 2025MEDIUM

All of the following are the conditions necessary for the interference of light EXCEPT that the

slits should be very thin and narrow.source of light should be monochromatic.amplitude of the light waves should be the same.light waves should travel in the opposite direction.

Class 11 - Physics / Unit 8 - Waves / 8.5 Doppler's Effect / 8.5.5

Past Paper 2025EASY

The speed of distant stars and galaxies can be calculated using

Doppler's effect.Compton's effect.Bernoulli's effect.Photoelectric effect.

Class 11 - Physics / Unit 8 - Waves / 8.5 Doppler's Effect / 8.5.2

Past Paper 2025EASY

Q10

When the source of sound moves away from a stationary listener, there is an apparent

increase in the pitch of sound.increase in the amplitude of sound.decrease in the frequency of sound.decrease in the wavelength of sound.

Class 11 - Physics / Unit 8 - Waves / 8.4 Stationary Waves / 8.4.1

Past Paper 2025EASY

Q11

In a stationary wave, the velocity of particles of a medium at the nodes

becomes zero.becomes maximum.varies unpredictably.remains constant but non-zero.

Class 11 - Physics / Unit 8 - Waves / 8.3 Superposition of Waves / 8.3.4

Past Paper 2025EASY

Q12

Beats occur when two waves have

unequal amplitudes and equal frequencies.equal amplitudes but highly different frequencies.equal amplitudes but slightly different frequencies.unequal amplitudes and highly different frequencies.

Class 11 - Physics / Unit 8 - Waves / 8.1 Wave Motion / 8.1.1

Past Paper 2025EASY

Q13

All of the following produce sound waves EXCEPT

a cry in air.a bell ringing under water.an explosion in outer space.a gun fired in a room with no echoes.

Class 11 - Physics / Unit 7 - Oscillations / 7.4 Simple Pendulum / 7.4.1

Past Paper 2025MEDIUM

Q14

The given figure shows a simple pendulum executing simple harmonic motion (SHM). The restoring force in the given simple pendulum is equal to

-mg\theta

-mg

mg\theta

mg

Class 11 - Physics / Unit 7 - Oscillations / 7.4 Simple Pendulum / 7.4.3

Past Paper 2025MEDIUM

Q15

What is the length of a simple pendulum if it has the time period of $1$ second? (Note: Take the value of acceleration due to gravity 'g' as $10\text{ m/s}^2$ .)

0.25\text{ m}

0.50\text{ m}

1.00\text{ m}

2.00\text{ m}