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Free Online Mock Physics Multiple Choice Test on Sound Waves
Sub Category : Sound Waves Test : 8 Time Left :
1)If fundamental frequency of closed pipe is 50Hz then frequency of 2nd overtone is
(1) 100Hz (2) 50Hz (3) 250Hz (4) 150Hz
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2)Apparatus used to find out velocity of sound in gas is
(1) Meldes' apparatus (2) Kundt's tube (3) Quinke's tube (4) None of these
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3) The displacement y of a particle in a medium can be expressed as:(1) y = 10-6 sin (100t+20x+ PI/4)m, where t is in second and x in metre. The speed of wave is (1) 2000 m/s (2)5 m/s (3) 20 m/s (4) 5 m/s
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4) A sound source is moving towards a stationary listener with 1/10th of the speed of sound. The ratio of apparent to real frequency is (1) 10/9 (2) (10/9)2 (3) (11/10)2 (4) 11/10 (5) 10/11
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5) A car is moving towards a high cliff. The car driver sounds a horn of frequency f. The reflected sound heard by the driver has a frequency 2f. If v be the velocity of sound, then the velocity of the car, in the same velocity units, will be(1) v/square Root 2 (2) v/3 (3) (4) v/2
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