| 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 |
When two identical travelling waves are superimposed, velocity of resultant wave. |
- A. Decreases
- B. Increases
- C. Remain same
- D. Becomes zero
|
| 3 |
In stationary waves, the velocity of particle at the node is. |
- A. Maximum
- B. Infinite
- C. Zero
- D. Varible
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| 4 |
The distance between the consecutive nodes is |
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| 5 |
The distance covered by wave in 1 sec is |
- A. wavelength
- B. Wave number
- C. Wave speed
- D. Frequency
|
| 6 |
Light waves are |
- A. Longtail waves
- B. Transvers waves
- C. Stationary waves
- D. Mechanical wave
|
| 7 |
When the amplitude of a wave is increase to doubled is energy. |
- A. Remain the same
- B. Increases 4 times
- C. Increases by two times
- D. Decreases by half
|
| 8 |
Wavelength of a wave for closed pipe having length 'l' in the fundamental mode is. |
- A. 2 l
- B. 1/2
- C. 4 l
- D. l
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| 9 |
If the wave motion is 0.01 sec and wave speed is 100 ms-1 then frequency of wave is. |
- A. 0.5 Hz
- B. 1 Hz
- C. 10 Hz
- D. 100 Hz
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| 10 |
According to Newton's formula, the speed of sound in air at STP is |
- A. 332 ,ms-1
- B. 340 ms-1
- C. 350 ms-1
- D. 280 ms-1
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