| 1 |
For a rocket , the change in momentum per second of the ejecting gases is equal. |
- A. Acceleration of the rocket
- B. Momentum of rocket
- C. Velocity of rocket
- D. Thrust acting on rocket
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| 2 |
The centre of Newton's rings will be |
- A. Dark
- B. Bright
- C. Coloured
- D. Not visible
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| 3 |
If focal length of objective and eye piece is 0.5 m and 10 cm respectively then magnifying power of telescope will be. |
|
| 4 |
3 Joules of work id done is 3 seconds, then power |
- A. 6 Watt
- B. 1 Watt
- C. 3 Watt
- D. 2 Watt
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| 5 |
The fringe spacing in a double slit experiment can be increased by decreasing. |
- A. Wavelength of light
- B. Width of slits
- C. Slit separation
- D. Distance between the slits and the screen
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| 6 |
The device used for measurement of liquid flow is. |
- A. Manometer
- B. Barometer
- C. Hydrometer
- D. Venturimeter
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| 7 |
If the initial velocity of a projectile becomes doubled, the time of fight will be. |
- A. Same
- B. 4 times
- C. Double
- D. 3 times
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| 8 |
The magnifying power of an astronomical telescope is 10. If the focal length of objective is 100 cm, then what is the focal length of eye piece. |
- A. 10 cm
- B. 100 cm
- C. 1000 cm
- D. 5 cm
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| 9 |
The subtraction of a vector is equivalent to the addition with |
- A. Same direction
- B. Perpendicular direction
- C. Reversed direction
- D. All of these
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| 10 |
When temperature of source and sink of a heat engine becomes equal then the entropy change will be. |
- A. zero
- B. Minimum
- C. Maximum
- D. Negative
|