Test Details

Superposition of Waves

Dec 11, 6:00 PM

60 minutes

Dec 11, 7:00 PM

25.0 marks

MCQ

25 questions

Mohd Faizullah Khatib

Class Details

Physics

FK Physics_

Physics

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Question Text

Question 2 :
When a sound wave, travelling in a medium bounces back to the same medium after striking the same second medium then _______ occurs.

Question 3 :
Which of the following quantity decrease as sound wave travels through a medium :

Question 4 :
Two stretched strings have lengths l and 2l while tension are T and 4T respectively. If they are made of same material the ratio of their frequency is:

Question 6 :
A ship sends a sonar wave to the sea bed which is flat and measured several times over a large area. One day the reflected sound wave takes longer time than in previous measurements. The possible reason is.

Question 7 :
Fill in the blank. <div>When a sound wave, travelling in a medium bounces back to the same medium after striking the same second medium then _______ occurs.</div>

Question 10 :
A source of sound of frequency 600 Hz is placed inside water. The speed in water is 1500 m/s and in air it is 300 m/s. The frequency of sound recorded by an observer standing in air is

Question 11 :
An ultrasonic source emits sound of frequency 220 kHz in air. If this sound meets a water surface, what is the wavelength of the transmitted sound? (At the atmospheric temperature, speed of sound in air $=352 m s^{-1} and in water = 1.496 m s^{-1}$)

Question 12 :
The equation of a sound wave is $y = 0.0015 \sin (62.8x+316t)$, the wave length of this wave is

Question 13 :
Stethoscope of doctors for finding quality, strength and frequency of human heart beat is based on the principle of

Question 14 :
An ultrasonic source emits sound of frequency 220 kHz in air. If this sound meets a water surface, what is the wavelength of the reflected sound?

Question 16 :
Mark the correct statements. (I) directions in which the sound is incident and is reflected make equal angles with the normal to the reflecting surface. (II) reflection of sound occurs from a polished surface. (III) reflection of sound occurs from rough surface.

Question 21 :
Fill the vacant space with the suitable option. A wave transfers ______from one location to another.

Question 22 :
Which phenomenon is observed due to the change in speed of wave when it strikes the another medium's boundary ?

Question 25 :
A wave is represented by an equation; $Y = A \cos kx \sin \omega t $ , then

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