A sounding tuning fork is brought near the end of a pipe containing an air column and the loudness of the sound increases. This effect is due to
A. diffraction B. an echo C. resonance D. interference E. reverberation Correct Answer: Option C – resonance
A boy standing a distance from the foot of a tall cliff claps his hands and hears an echo 0.5s later. If the speed of sound is 340ms1, how far is he from the cliff?
A. 17m B. 34m C. 85m D. 170m E. 680m Correct Answer: Option C – 85m Explanation X = vt/2 = (340 x 0.5)/2 = 85m
Which of the following statement s is/are not correct about a standing wave?
I. It is formed by the superimposition of two progressive waves traveling in the same direction II. All points on the wave are vibrating with maximum displacement III. It is formed by the superimposition of two progressive waves of different amplitudes traveling in...
A source of sounds produces waves in air of wavelength1.65m. If the speed of sound in air is 330ms-1 the period of vibration in seconds is?
A. 200 B. 2.0 C. 0.5 D. 0.02 E. 0.005 Correct Answer: Option E – 0.005 Explanation T = λ/v T = 1.65/330 = 0.005
The change of the direction of a wave-front because of a change in the velocity of the wave in another medium is called?
A. refraction B. reflection C. diffraction D. interference E. dispersion Correct Answer: Option C – diffractionProducts
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