8. When a wave crest is incident upon a fixed end of a string, it returns as a r

Question

8. When a wave crest is incident upon a fixed end of a string, it returns as a reflection; therefore, when a trough is incident upon a free end, it must return as a after reflection. (crest trough) after (crest trough) a. Crest, crest b. Crest, trough c. Trough, crest d. Trough, trough 9. The speed of the reflected pulse is 10. The wavelength of the reflected pulse is the wavelength of the incident pulse 11. The amplitude of the reflected pulse is the speed of the incident pulse. a. the same b. greater than c. less than a. the same b. greater than c. less than the amplitude of the incident pulse. a. the same b. greater than c. less than 12. If the frequency of a certain wave is 10 Hertz, its period is a. 0.1 s b. 10 s c. 100 s d. none of these 13. A 100 Hz wave is moving at 300 m/s. Its wavelength is: a. 100 m b. 3 m c. 0.3 m d. 300 m

Explanation / Answer

3. A) The option A represents the correct wave pattern as the negative and positive sides cancel each other on passing through.

4. f1?1 = f2?2

f1 x ? = f2?/3

f1/f2 = 1/3 optionA is correct.

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