Test Details

Report

Sound

Mar 19, 8:00 PM

30 minutes

Mar 19, 8:30 PM

40.0 marks

MCQ

24 questions

PRASHANT N PUROHIT

Achievers'Academy

Class Details

Maths

Science

Class 8th

Maths

Science

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Question Text

Question 2 :
Which of the following sounds have the highest frequency? a) A man shouting. b) The sound of a whistle. c) A lion's roar. d) The sound of a drum.

Question 3 :
What is the unit for measuring the amplitude of a sound?

Question 4 :
 Which of the following voice is likely to have minimum frequency?

Question 5 :
A tuning fork produces 20 vibrations per second. What is the frequency of the tuning fork:

Question 6 :
The frequency of a wave traveling at a speed of $500 m/s$ is $25 Hz$. Its time period will be :

Question 7 :
According to WHO (World Health Organisation), what is the loudness limit of sound in industries?

Question 8 :
One can be recognised by his voice due to the uniqueness of:

Question 9 :
The characteristic of sound which helps to distinguish between a man's voice and a woman's voice is.

Question 10 :
A tuning fork vibrates with 2 vibrations in 0.4 seconds. Its frequency (in Hz) is

Question 11 :
Time period of a sound wave having the wavelength 0.2 m and frequency 10 Hz will be

Question 12 :
If an object oscillates $20$ times in $5\ sec$, then what is the frequency of the object?

Question 13 :
A vibrating particle displacement is zero in every 2 secs. The frequency of vibration is

Question 14 :
When we hit a thin plastic ruler firmly on a bench:

Question 15 :
The time period of the second hand in a clock is :

Question 17 :
In the bell jar experiment, as air is removed from the jar :

Question 18 :
A small bee produces sound while it moves. The sound is created due to

Question 21 :
A bomb explodes on the moon. How long will it take for the sound to reach the earth?

Question 22 :
A source of wave produces $1$ crest and $1$ trough in $16\ s.$ Find the frequency of the wave.

Question 24 :
Which of these is not a function of the ear drum?

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