Chapter 5: Acoustics — Online MCQ Test
SCIENCE · CLASS 10th · Tamil Nadu State Board
Practice Chapter 5: Acoustics with a free chapter-wise online MCQ test.
This chapter covers: This chapter explores sound wave propagation velocity Doppler effect and factors affecting sound speed in different media. Students study echo applications ultrasonography and reve....
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 5: Acoustics — Important Questions & Answers
Sound travels in the form of which type of waves?
- A. Transverse waves
- B. Longitudinal waves
- C. Electromagnetic waves
- D. Stationary waves
Answer: B. Longitudinal waves
Sound waves require a medium to travel and are characterized by the compression and rarefaction of particles, making them longitudinal.
Sound waves require a medium to travel and are characterized by the compression and rarefaction of particles, making them longitudinal.
What is the unit of frequency?
- A. Meter
- B. Second
- C. Hertz
- D. Newton
Answer: C. Hertz
Hertz (Hz) is the standard SI unit used to measure the frequency of sound waves.
Hertz (Hz) is the standard SI unit used to measure the frequency of sound waves.
What is the audible frequency range for a normal human being?
- A. 20 Hz to 20,000 Hz
- B. 200 Hz to 20,000 Hz
- C. Below 20 Hz
- D. Above 20,000 Hz
Answer: A. 20 Hz to 20,000 Hz
Humans can typically hear sound frequencies ranging from 20 Hz to 20 kHz.
Humans can typically hear sound frequencies ranging from 20 Hz to 20 kHz.
If the temperature of air increases, the velocity of sound:
- A. Decreases
- B. Increases
- C. Remains the same
- D. Becomes zero
Answer: B. Increases
The velocity of sound in air is directly proportional to the square root of the absolute temperature of the gas.
The velocity of sound in air is directly proportional to the square root of the absolute temperature of the gas.
A thunderclap is heard 5 seconds after lightning is seen. If the speed of light is 3x10^8 m/s and speed of sound is 330 m/s, how far is the storm?
- A. 1650 meters
- B. 1500 meters
- C. 1.5 km
- D. 3300 meters
Answer: A. 1650 meters
Since light travels almost instantaneously, the distance is simply Speed of sound × Time delay = 330 × 5 = 1650 meters.
Since light travels almost instantaneously, the distance is simply Speed of sound × Time delay = 330 × 5 = 1650 meters.