| 1 |
Stars moving away from Earth show a |
- A. Green shift
- B. Blue shift
- C. Red shift
- D. Yellow shift
|
| 2 |
Longitudinal waves do not exhibit |
- A. Reflection
- B. Refraction
- C. Polarization
- D. Diffraction
|
| 3 |
The speed of sound increases with the increase of in |
- A. Pressure
- B. Volume
- C. Temperature
- D. Density
|
| 4 |
Teh speed of sound in air is 340 m/s. If the pressure of air is doubled then the speed becomes. |
- A. Double
- B. Half
- C. Four times
- D. Remains same
|
| 5 |
The distance between the consecutive nodes is |
|
| 6 |
In stationary waves, the velocity of particle at the node is. |
- A. Maximum
- B. Infinite
- C. Zero
- D. Varible
|
| 7 |
In stationary waves, the particle velocity at nodes is |
- A. Minimum
- B. Maximum
- C. Zero
- D. Constant
|
| 8 |
Who did give the correct formula for the speed of sound in air? |
- A. Boyle
- B. Laplace
- C. Newton
- D. Einstein
|
| 9 |
Star moving towards the earth show |
- A. Red shift
- B. Blue shift
- C. Green shift
- D. Yellow shift
|
| 10 |
Radar system is an application of. |
- A. Chemical effect
- B. Electric effect
- C. Magnetic effect
- D. Doppler's effect
|
