| 1 |
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
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| 2 |
The SI unit of flow rate are |
- A. m-sec<sup>-2</sup>
- B. m<sup>3</sup>-sec<sup>-1</sup>
- C. m<sup>3</sup>-sec<sup>-2</sup>
- D. m-sec<sup>-3</sup>
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| 3 |
In case the work done in zero. |
- A. Constant pressure
- B. Constant volume
- C. Constant temperature
- D. Constant mass
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| 4 |
A collision in which K.E. of the system is not conserved is |
- A. Elastic collision
- B. Inelastic collision
- C. 3rd low of motion
- D. None of these
|
| 5 |
The density of blood is nearly equal to. |
- A. Air
- B. Milk
- C. Honey
- D. Water
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| 6 |
In case of point source the shape of wave front is |
- A. Circular
- B. Spherical
- C. Elliptical
- D. Square
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| 7 |
The power needed to lift a mass of 5000 g to height of 1 m in 2 secnd is |
- A. 2.45 watt
- B. 24.5 watt
- C. 245 watt
- D. 2.45 watt
|
| 8 |
In simple harmonic motion the velocity of a particle is maximum at. |
- A. Extreme position
- B. Mean position
- C. In between extreme and mean position
- D. None of them
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| 9 |
the acceleration along x -axis direction in case of projectile is. |
- A. Zero
- B. Equal to gravity
- C. Maximum
- D. Constant
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| 10 |
The potential energy to the molecules of an ideal gas is considered to be. |
- A. Maximum
- B. Zero
- C. 1/2 kx<sup>2</sup>
- D. 1/2 kx
|