10. Oscillation & Waves
Prepared by Vinodkumar M, HSST Physics, St. Aloysius HSS, Elthuruth, Thrissur
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1. A body oscillating with shm is given by x = 5cos[2πt + π/4]. The displacement at time t = 1.5 s is ............. *
1 point
2. While conducting resonance column experiment in lab, you can hear a loud sound at a certain height this is due to *
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3. Open pipes are preferred to closed pipes for musical instruments because *
1 point
4. A transverse harmonic wave on a string is described by y(x, t) = 3.0 sin[36t + 0.018 x +π/4]. Where x and y are in centimetres and t is in second. The positive X direction is from left to right. {4(a) to 4(d)}       4 (a) The wave is ........ *
1 point
4 (b) Ampliutude and frequency of wave is .............. *
2 points
4(c) Initial phase at the origin is .............. *
1 point
4(d) If it is traveling wave, the speed of propagation is ........ *
2 points
5. A spring with spring constant 1200 N/m is mounted of a table as in fig. A mass of 3kg is attached to the free end of the spring. The mass is pulled sideways through 2 cm and released. 5 (a) Frequency of oscillation of the spring is................. *
1 point
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5(b) Maximum acceleration of the mass is ............. *
2 points
6. Second's pendulum is a pendulum having *
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7. The frequency of oscillation of a simple pendulum mounted in a cabin which is falling freely under gravity is ................ *
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8. A student plucks the centre of a stretched string and observes the wave pattern produced. The type of wave is ................... *
1 point
9. The displacement of an oscillating particle is given by y = 2 cos[0.5πt + π/3] cm. Its amplitude and period are............. *
2 points
10. A sound traveling along a string is given by y = 0.005sin(80.0 x + 3.0 t) m. Its wavelength is ........ *
1 point
11. A girl is swinging on a swing in the sitting position. How will the period of swing be affected if she stands up? *
1 point
12. Figure shows a pendulum at mean position X. It is pulled to the position Y and released. It swings from Y to Z and back to Y. 12 (a) Fill the following statement.       "To move the bob from X to Y ................has to be done on it and its .......................energy increases. On moving from Y to X some of this energy is converted into .............energy. Through out the swing from Y to Z and back to Y, the total energy is ......................... *
2 points
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12 (b) Acceleration of the bob when it is at X ............. *
1 point
13. A man with wrist watch on his hand falls from the top of a tower. The watch give correct time during the fall. *
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14. A particle executing SHM is an example of *
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15. An SHM is given by y = 8 sin[10πt - π/4] m. At which position will its KE becomes equal to its PE. *
2 points
16. The time period of a simple pendulum of length L as measured in a lift descending with an acceleration g/3 m/s^2 is ..................... Choose from the figure *
2 points
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17. The pitch of syren of fire engine increases as it approaches near a boy standing in a bus stop. This is due to the phenomenon of *
1 point
18. The acceleration due to gravity on the surface of the moon is 1.7 m/s. What is the time period of a simple pendulum on the moon, if its time period on the earth is 3.5 s? *
2 points
19. For a SHM of time period 2 s  the displacement from mean position is 10 cm, its instantaneous acceleration is ............ *
2 points
20. A woman is traveling in a car with a speed of 25 m/s away from a source producing a sound of 512 Hz. The frequency of sound heard by her is ..................[velocity of sound in air = 340 m/s] *
1 point
21. Standing waves produced in an open pipe contains *
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22. Which harmonic mode of the pipe is resonantly exerted by 1.1 kHz in an open pipe of length 30cm. (Velocity of sound = 330 m/s) *
2 points
23. If an open pipe produce a fundamental frequency f in air, the fundamental frequency produced by the same pipe dipped half in water is *
1 point
24. Which one of the following relationships between the acceleration (a) and the displacement (r) of a particle involve simple harmonic motion? *
1 point
25. The point on a standing wave with maximum displacement and minimum strain is ......... *
1 point
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