1. Some common mediums in which speed of sound waves is measured are mentioned below?
1. Air 2. Steel
3. Copper 4. Water What is the correct increasing order of the speed of sound ?

2. If the length of second's pendulum is increased by 2%, how many seconds will it lose per day?

3. List I (Types of Electromagnetic Radiation) List II (Approximate Wavelength in Metre)
A. Infraredradiation 1. 10^–12
B. X-rays 2. 10^–5
C. Ultavoilet radiation 3. 10^–10
D. Gamma rays 4. 10^–8 Codes : A B C D

4. In a sitar wire which one of the following types of vibration is produced?

5. The speed of a body that has Mach number more than 1 is

6. Which one of the following statements is not correct?

7. Which one of the following properties distinguishes ultrasound from normal audible sound?

8. Consider the following statements : If the same note is played on a flute and a sitar, one can still distinguish between them because they differ in
1. frequency 2. intensity
3. quality Which of the statements given above is/are correct?

9. Which one of the following is not electromagnetic in nature?

10.
The standing wave pattern along a string of length 60 cm is shown in the above diagram. If the speed of the transverse waves on this string is 300 m/s, in which one of the following modes is the string vibrating ?

11. Sound waves are similar to the waves

12. Consider the following statements for a simple harmonic motion:
1. The magnitude of the velocity of the body is proportional to its displacement from the mean position.
2. The magnitude of the acceleration of the body is proportional to its displacement from the mean position.
3. The sum of the kinetic energy and potential energy of the body is always constant. Which of the statements given above is/are correct ?

13. Which one of the following frequency ranges is sensitive to human ears?

14. Sound moves with higher velocity if

15. The simple harmonic motion of a particle is given by y = 3 sin wt + 4 cos wt. Which one of the following is the amplitude of this motion?

16. A sonometer wire having a length of 50 cm is vibrating in the fundamental mode with a frequency of 100Hz. Which of the following is the type of propagating wave and its speed?

17. Which one among the following happens when a swing rises to a certain height from its rest position ?

18. Which one among the following is not produced by sound waves in air?

19. A pendulum clock is set to give correct time at the sea level. The clock is moved to a hill station at an altitude 'h' above sea level. In order to keep correct time on the hill station which one of the following adjustments is required?

20. The time period of oscillation of a simple pendulum having length L and mass off the bob m is given as T. If the length of the pendulum is increased to 4L and the mass of the bob is increased to 2m, then which one of the following is the new period of oscillation?

21. Which one of the following statements is not correct?

22. A spring can be used to determine the mass m of an object in two ways: (i) by measuring the extension in the spring due to the object; and (ii) by measuring the oscillation period for the given mass. Which of these methods can be used in a space-station orbiting Earth ?

23. SONAR is mostly used by

24. Which of the following statements about electromagnetic waves, sound waves and water waves is/are correct?
1. They exhibit reflection
2. They carry energy
3. They exert pressure
4. They can travel in vacuum Select the correct answer using the code given below:

25. Which one of the following pairs of rays is electromagnetic in nature?