1.Akash drop a stone from top of a tower 500 m high into a pond of water at the base of the tower. When is the Splash heard at the top? Given,g=10 m/s² and speed of sound = 340 m/s.
2. Two boys Ravi and Harsh are at the opposite ends of an aluminium rod. One strikes the end of the rod with a stone. Speed of sound in aluminium=6420m/s. Find the ratio of time taken by the sound waves in air and in the aluminium to reach the other end.
3. Prithvi is listening to a tone of 500Hz sitting at a distance of 450 m from the source of sound. What is the time interval between successive compression from the source?
4. Flash and Thunder are produced simultaneously. But thunder is heard a few seconds after the flash is seen.why? Define and distinguish between these two waves which are responsible for this phenomena.
5. Suppose you and your friend Ashok are on the moon. Will you be able to hear any sound produced by your friend? Explain your answer on the basis of some practical activity.
6. In a ripple tank,10 full ripple are produced in one second. If the distance between trough and the next crest is 0.12m, find out
A. Frequency
B. Wavelength
C. Velocity of the wave.
7. Is wave and wave motion are both same? Explain it. Discuss characteristics of wave motion and a medium to ensure the propagation of a sound in it.
8. Distinguish between ultrasonic and Supersonic sound. Why do astronauts talk to each other through radio telephone in space?
9. Ranchi radio station transmits a call in program at 219m wavelength and 1300 Hz frequency. Find the velocity of radio waves?
10. Harshvardhan ship is anchor at Visakhapatnam Shipyard, is rocked by waves whose troughs are 150 m apart and whose velocity is 30 metre per second. How how often do the crest reach the ship?
Sir completed. Please post practice questions of Current Electricity 🙏
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