| 1 |
Two tuning forks of frequencies 240 Hz and 243 Hz are sounded together, the number of beats per second is. |
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| 2 |
In stationary waves, the velocity of particle at the node is. |
- A. Maximum
- B. Infinite
- C. Zero
- D. Varible
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| 3 |
Who did give the correct formula for the speed of sound in air? |
- A. Boyle
- B. Laplace
- C. Newton
- D. Einstein
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| 4 |
The apparent change in the pitch of sound due to relative motion is called. |
- A. Carnot theorem
- B. Interference
- C. Doppler effect
- D. Beats
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| 5 |
When two identical travelling waves are superimposed, velocity of resultant wave. |
- A. Decreases
- B. Increases
- C. Remain same
- D. Becomes zero
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| 6 |
Half wavelength corresponds to |
- A. 0 <sup>o</sup>
- B. 90 <sup>o</sup>
- C. 180 <sup>o</sup>
- D. 360 <sup>o</sup>
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| 7 |
the louder the sound, the greater will be its. |
- A. Speed
- B. Frequency
- C. Amplitude
- D. Wave length
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| 8 |
10 waves pass through a point in 2 seconds with speed 10 ms-1 the frequency of wave will be |
- A. 1 Hz
- B. 2 Hz
- C. 5 Hz
- D. 10 Hz
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| 9 |
If 20 waves passes through he medium in 2 sec of 10 ms-1 then he wavelength is. |
- A. 200 m
- B. 2 m
- C. 1 m
- D. 0.5 m
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| 10 |
When two waves having same frequency traveling in same direction combine, phenomenon is called |
- A. Wave motion
- B. Combination of waves
- C. Interference
- D. Diffraction
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