Practice Sound and Waves – GK Quiz with Answers – Level 3

Consider the following statements about sound:

1. Sound is produced when an object vibrates.

2. In air, the particles of the medium oscillate perpendicular to the direction in which sound travels.

3. Sound is a mechanical wave and cannot travel through a vacuum.

Which of the statements given above is/are correct?

Match List-I with List-II:

Select the correct answer using the codes given below.

Consider the following statements about the speed of sound:

1. Sound travels faster in steel than in water.

2. The speed of sound in a medium decreases as its temperature increases.

Which of the statements given above is/are correct?

Consider the following statements about an echo:

1. The sensation of a sound persists in our brain for about 0.1 s.

2. To hear a distinct echo in air at 22 degrees C, the obstacle should be at least about 17.2 m away.

3. This minimum distance for an echo stays the same at all temperatures.

Which of the statements given above is/are correct?

Consider the following statements about SONAR:

1. SONAR stands for SOund Navigation And Ranging.

2. SONAR uses infrasonic waves to locate objects.

3. SONAR measures the distance, direction and speed of underwater objects.

Which of the statements given above is/are NOT correct?

Consider the following statements:

1. Ultrasound is used in medicine to break small stones formed in the kidneys.

2. Reverberation in a large hall can be reduced by covering the walls with sound-absorbent materials.

Which of the statements given above is/are correct?

Consider the following statements about the characteristics of sound:

1. Pitch is the way the brain interprets the frequency of a sound.

2. The pitch of a sound depends on the speed of sound in the medium.

3. Striking an object harder increases the amplitude of its sound and makes it louder.

Which of the statements given above is/are correct?

Arrange the following stages in the formation of an echo in the correct sequence:

1. The reflected sound reaches the listener and is heard again as an echo.

2. An object vibrates and produces sound.

3. The sound strikes a distant wall or hill and is reflected.

4. The sound travels through the air as a longitudinal wave.

Select the correct order using the codes given below.

Consider the following statements about SONAR:

1. The waves used in SONAR have frequencies above 20 kHz.

2. SONAR can measure the speed of an underwater object.

3. The waves used in SONAR lie within the human audible range.

Which of the statements given above is/are correct?

Consider the following statements:

1. Light can travel through vacuum, but sound cannot.

2. Sound needs a medium because it is a mechanical wave.

Which of the statements given above is/are correct?