## Saturday, 15 October 2016

### CLASS 11 CBSE PHYSICS OSCILLATION AND WAVES ONE MARK QUESTIONS

1. How is the time period effected, if the amptitude of a simple pendulum is increased?
2. Define force constant of a spring.
3. At what distance from the mean position, is the kinetic energy in simple harmonic oscillator equal to potential energy?
4. How is the frequency of oscillation related with the frequency of change in the of K.E and P.E of the body in S.H.M.?
5. What is the frequency of total energy of a particle in S.H.M.?
6. How is the length of seconds pendulum related with acceleration due gravity of any planet?
7. If the bob of a simple pendulum is made to oscillate in some fluid of density greater than the density of air (density of the bob density of the fluid), then time period of the pendulum increased or decrease.
8. How is the time period of the pendulum effected when pendulum is taken to hills or in mines?
9. A transverse wave travels along x-axis. The particles of the medium must move in which direction?
10. Define angular frequency. Give its S.I. unit.
11. Sound waves from a point source are propagating in all directions. What will be the ratio of amplitudes at distances of x meter and y meter from the source?
12. Does the direction of acceleration at various points during the oscillation of a simple pendulum remain towards mean position?
13. What is the time period for the function f(t) = sin ωt +cos ωt may represent the simple harmonic motion?
14. When is the swinging of simple pendulum considered approximately SHM?
15. Can the motion of an artificial satellite around the earth be taken as SHM?
16. What is the phase relationship between displacement, velocity and accelection in SHM?
17. What forces keep the simple pendulum in motion?
18. How will the time period of a simple pendulum change when its length is doubled?
19. What is a harmonic wave function?
20. If the motion of revolving particle is periodic in nature, give the nature of motion or projection of the revolving particle along the diameter.
21. In a forced oscillation of a particle, the amplitude is maximum for a frequency w1 of the force, while the energy is maximum for a frequency w2 of the force. What is the relation between w1 and w2?
22. Which property of the medium are responsible for propagation of waves
through it?
23. What is the nature of the thermal change in air, when a sound wave propagates through it?
24. Why does sound travel faster in iron than in water or air?
25. When will the motion of a simple pendulum be simple harmonic?
26. A simple harmonic motion of acceleration ‘a’ and displacement ‘x’ is represented by a + 4π2x = 0. What is the time period of S.H.M?
27. What is the main difference between forced oscillations and resonance?
28. Define amplitude of S.H.M.
29. What is the condition to be satisfied by a mathematical relation between time and displacement to describe a periodic motion?
30. Why the pitch of an organ pipe on a hot summer day is higher?
31. Under what conditions does a sudden phase reversal of waves on reflection takes place?