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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=4sinâ¡(ωt+kx), y2=-4cosâ¡(ωt+kx), the phase difference is? | ||
| A. | π/2 | ||
| B. | 3Ï€/2 | ||
| C. | π | ||
| D. | Zero | ||
| 5. | A wave equation is y=0.1sin[100Ï€t-kx] and wave velocity is 100m/s, its number is equal to? | ||
| A. | 1/m | ||
| B. | 2/m | ||
| C. | π/m | ||
| D. | 2Ï€/m | ||
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