Progressive Waves Multiple Questions and Answers.




1.The disc of a siren containing 60holes rotates at a constant speed of 360rpm. The emitted sound is in unison with a tuning fork of frequency.
A. 10Hz
B. 360Hz
C. 216Hz
D. 60Hz

2.The quantity which does not change, when sound enters from one medium to another?
A. Wavelength
B. Speed
C. Frequency
D. Velocity

3.If wave y=Acos(ωt+kx) Is moving along x-axis, the shapes of a pulse at t=0 and t=2s.
A. Are different
B. Are same
C. May not be the same
D. Unpredictable

4.y1=4sin⁡(ωt+kx), y2=-4cos⁡(ωt+kx), the phase difference is?
A. π/2
B. 3π/2
C. π
D. Zero

5. A wave equation is y=0.1sin[100πt-kx] and wave velocity is 100m/s, its number is equal to?
A. 1/m
B. 2/m
C. π/m
D. 2π/m

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