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Wave Motion & Sound

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Santanu Roy

## Amartya
the waves used for a communication through artificial satellite are….1)radio waves in the FM band…2) radio waves in the AM band..3)microwaves…4) none of the above

Boni

microwaves

Santanu Roy

eta ekta site e 3 to blche.. tao ekbar dkte hbe

Santanu Roy

## Amartya
The loudness of sound is related to…1) its frequency..2)its amplitude…3) its speed…4) its pitch

Boni

2)its amplitude…

Santanu Roy

## Amartya
A noise level of 100 decibel would corresponds to…1)sound from a noisy street…2) just audible sound…3) noise from machine shop…4) ordinary conversation

Boni

3) noise from machine shop…

Santanu Roy

## Amartya
Sound waves do not exhibit the phenomenon of..1) refraction..2)interference..3) polarisation…4)diffaraction

3) polarisation…

Boni

The speed of sound will be highest in—-
a. dry air at 0 degree c
b. dry air at 30 degree c
c. humid air at 0 degree c
d. humid air at 30 degree c

Santanu Roy

d. humid air at 30 degree c

Santanu Roy

When a sound wave goes from one medium to another, the quantity that remains unchanged is
(a) frequency (b) amplitude
(c) wavelength (d) speed

(a) frequency

Santanu Roy

A womans voice is shriller than aman’s due to
a. higher frequency
b. higher amplitude
c. lower frequency
d. weak voval cords

Santanu Roy

a. higher frequency

Boni

A womans voice is shriller than aman’s due to
a. higher frequency
b. higher amplitude
c. lower frequency
d. weak voval cords

Santanu Roy

c. lower frequency

Boni

a. higher frequency

Santanu Roy

A shrill sound has a ______ pitch and a dull sound has a _____ pitch.
(a) high, low (b) low, high
(c) low, low (d) high, high

Boni

(a) high, low

The pitch of shortness of a sound depends on-
The frequency of vibration /vibration / temperature / pressure

Santanu Roy

The frequency of vibration

meghna sarkar

a

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