AKUEB Class 11 (HSSC-I) Physics Waves MCQs & Practice Questions

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

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

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

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

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 8 - Waves / 8.3 Superposition of Waves / 8.3.1

Model Paper 2026EASY

The resultant displacement at any point due to the sum of displacements of two or more waves is called

interferenceDoppler's effectHuygen's principleprinciple of superposition

Class 11 - Physics / Unit 8 - Waves / 8.2 Transverse and Longitudinal Waves / 8.2.1

Model Paper 2026EASY

The phenomenon of wave that distinguishes between transverse and longitudinal waves is

refractiondiffractioninterferencepolarisation

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

Model Paper 2026MEDIUM

When a listener moves away from a stationary source of sound, then the apparent change in the pitch and frequency of sound for the listener is

Pitch: low, Frequency: lowPitch: high, Frequency: lowPitch: low, Frequency: highPitch: high, Frequency: high

Class 11 - Physics / Unit 8 - Waves / 8.4 Stationary Waves / 8.4.3

Model Paper 2026HARD

One end closed pipe has a loudspeaker at its open end. A stationary sound wave is formed in the air within the pipe with an antinode at the open end of it, as shown in the given figure. The length of the pipe is 0.4 m. (Note: The speed of sound in air is 343 m/s.) The frequency of sound that produces a stationary wave from the loudspeaker is

214.4 Hz285.8 Hz428.8 Hz857.5 Hz

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

Model Paper 2026EASY

Q10

When two tuning forks of nearly the same frequencies are sounded together, a note of alternately increasing and decreasing intensity will be heard. Based on the given description, the note is called

beatwaveformdiffractionpolarisation

Class 11 - Physics / Unit 8 - Waves / 8.1 Wave Motion / 8.1.4

Model Paper 2026EASY

Q11

If a wave has a frequency of 10 Hz, then the time period of the wave will be

0.1 s1.0 s10 s100 s

Class 11 - Physics / Unit 8 - Waves / 8.1 Wave Motion / 8.1.2

Model Paper 2026EASY

Q12

The option which is TRUE about the speed of wave on a string is that speed depends on the

frequencyamplitudemass per unit length of the stringatmospheric conditions of the surrounding

Waves - Class 11 (HSSC-I) Physics