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NCERT Class VIII Science Solutions: Chapter 13 - Sound Part 1
MULTIPLE CHOICE QUESTIONS
Question 1:
A list of mediums is given below.
- Wood
- Water
- Air
- Vacuum
In which of these mediums can sound travel?
- i & ii only
- i, ii & iii only
- iii & iv only
- ii, iii & iv only
Answer: B
Question 2:
The loudness of sound depends on:
- Its amplitude.
- Its frequency.
- Its time period.
- Its speed.
Answer: A
Question 3:
Which of the following statements are correct?
- Sound is produced by vibrations.
- Sound requires a medium for propagation.
- Light and sound both require a medium for propagation.
- Sound travels slower than light.
- i & ii only
- i, ii & iii only
- ii, iii & iv only
- i, ii & iv only
Answer: D
Question 4:
An object is vibrating at 50 hertz. What is its time period?
Answer: A
Question 5:
In order to reduce the loudness of a sound we have to
- Decrease its frequency of vibration of the sound.
- Increase its frequency of vibration of the sound.
- Decrease its amplitude of vibration of the sound.
- Increase its amplitude of vibration of the sound.
Answer: C
Question 6:
Loudness of sound is measured in units of
Answer: A