| 1 |
In vibrating string, the points where the amplitude is maximum are called. |
- A. Nodes
- B. Antinodes
- C. Troughs
- D. Crests
|
| 2 |
Radar system is an application of. |
- A. Chemical effect
- B. Electric effect
- C. Magnetic effect
- D. Doppler's effect
|
| 3 |
Speed of sound in copper is |
- A. 38000 ms-1
- B. 3600 ms-1
- C. 3500 ms-1
- D. 3400 ms-1
|
| 4 |
The waves used in radar speed trap are |
- A. <u>Longitudinal</u>
- B. Sound wave
- C. Micro waves
- D. Matter waves
|
| 5 |
In which medium the speed of sound is greater. |
- A. Oxygen
- B. Air
- C. Water
- D. copper
|
| 6 |
When sound waves enter in different medium, the quantity that remains unchanged is. |
- A. Intensity
- B. Speed
- C. Frequency
- D. Wave length
|
| 7 |
When the amplitude of a wave become double, its energy becomes |
- A. One half
- B. Two times
- C. Three times
- D. Four times
|
| 8 |
Waves transport energy without transporting |
- A. Matter
- B. Force
- C. Momentum
- D. All of these
|
| 9 |
When ever the path difference between the waves is integral multiple of half the wavelength, interference will be |
- A. Constructive
- B. Destructive
- C. (-)ve
- D. (+) ve
|
| 10 |
Stars moving away from Earth show a |
- A. Green shift
- B. Blue shift
- C. Red shift
- D. Yellow shift
|
