Test Details

Sound

MCQ

Feb 09, 9:05 AM

30 minutes

Feb 09, 9:35 AM

60.0 marks

MCQ

30 questions

Anshu Bhardwaj

Class Details

Science

Science VIII B

Science

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Question Text

Question 1 :
Which of the following statements are correct? (i) Sound is produced by vibrations. (ii) Sound requires a medium for propagation. (iii) Light and sound both require a medium for propagation. (iv) Sound travels slower than light.

Question 5 :
Lack of sleep, hypertension, anxiety and many more health disorders may be caused by ______________

Question 6 :
If the amplitude of vibration is large, sound is feeble. State true or false.

Question 7 :
State True or False: The lower the frequency of vibration, the higher is the pitch.

Question 9 :
How can we recognize many familiar sounds without seeing the objects producing them?

Question 10 :
A pendulum oscillates 40 times in 4 seconds. Find its time period.

Question 14 :
A simple pendulum makes 10 oscillations in 20 seconds. What is the time period and frequency of its oscillation?

Question 17 :
Does the frequency of the voice of a child is higher than that of an adult?

Question 18 :
A pendulum oscillates 40 times in 4 seconds. Find its frequency.

Question 20 :
The lower the frequency of vibration, the higher is the pitch. Is the given statement correct ?

Question 24 :
Your parents are going to buy a house. They have been offered one on the roadside and another three lanes away from the roadside. Which house would you suggest your parents should buy?

Question 25 :
The to and fro motion of an object is known as _______ motion.

Question 26 :
Noise pollution may cause partial hearing impairment. Is that correct ?

Question 27 :
The sound from a mosquito is produced when it vibrates its wings at an average rate of 500 vibrations per second. What is the time period of the vibration?

Question 29 :
In order to reduce the loudness of a sound we have to

Question 30 :
State True or False: Unwanted or unpleasant sound is termed as music.

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